/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:51:01,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:51:01,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:51:01,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:51:01,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:51:01,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:51:01,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:51:01,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:51:01,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:51:01,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:51:01,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:51:01,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:51:01,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:51:01,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:51:01,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:51:01,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:51:01,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:51:01,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:51:01,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:51:01,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:51:01,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:51:01,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:51:01,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:51:01,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:51:01,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:51:01,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:51:01,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:51:01,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:51:01,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:51:01,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:51:01,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:51:01,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:51:01,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:51:01,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:51:01,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:51:01,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:51:01,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:51:01,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:51:01,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:51:01,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:51:01,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:51:01,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:51:01,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:51:01,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:51:02,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:51:02,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:51:02,000 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:51:02,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:51:02,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:51:02,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:51:02,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:51:02,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:51:02,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:51:02,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:51:02,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:51:02,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:51:02,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:51:02,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:51:02,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:51:02,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:51:02,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:51:02,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:51:02,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:51:02,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:02,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:51:02,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:51:02,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:51:02,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:51:02,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:51:02,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:51:02,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:51:02,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:51:02,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:51:02,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:51:02,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:51:02,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:51:02,460 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:51:02,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2020-10-28 08:51:02,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e1be5d8/3adf187de8794787a5622e06ac020eac/FLAG4f0249d68 [2020-10-28 08:51:03,275 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:03,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2020-10-28 08:51:03,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e1be5d8/3adf187de8794787a5622e06ac020eac/FLAG4f0249d68 [2020-10-28 08:51:03,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0e1be5d8/3adf187de8794787a5622e06ac020eac [2020-10-28 08:51:03,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:03,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:03,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:03,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:03,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:03,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57320c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03, skipping insertion in model container [2020-10-28 08:51:03,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:03,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:03,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:03,873 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:03,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:03,913 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:03,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03 WrapperNode [2020-10-28 08:51:03,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:03,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:03,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:03,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:03,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... [2020-10-28 08:51:03,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:03,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:03,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:03,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:03,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:04,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:04,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:04,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:04,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:04,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:04,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:04,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:04,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:04,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:04,042 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:04,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:04,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:04,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:04,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:04,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:04,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:04,544 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:04,544 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:51:04,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:04 BoogieIcfgContainer [2020-10-28 08:51:04,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:04,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:04,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:04,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:04,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:03" (1/3) ... [2020-10-28 08:51:04,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aa0d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:04, skipping insertion in model container [2020-10-28 08:51:04,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:03" (2/3) ... [2020-10-28 08:51:04,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63aa0d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:04, skipping insertion in model container [2020-10-28 08:51:04,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:04" (3/3) ... [2020-10-28 08:51:04,561 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2020-10-28 08:51:04,575 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:04,581 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:04,596 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:04,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:04,638 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:04,638 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:04,638 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:04,638 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:04,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:04,639 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:04,639 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 08:51:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:04,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:04,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:04,677 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1730802319, now seen corresponding path program 1 times [2020-10-28 08:51:04,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:04,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096791915] [2020-10-28 08:51:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:05,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:05,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-28 08:51:05,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:51:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:51:05,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:05,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:51:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:05,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096791915] [2020-10-28 08:51:05,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:05,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671244195] [2020-10-28 08:51:05,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:05,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:05,274 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 08:51:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:05,395 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2020-10-28 08:51:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:05,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 08:51:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:05,406 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:51:05,406 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 08:51:05,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 08:51:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 08:51:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:51:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 08:51:05,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2020-10-28 08:51:05,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:05,455 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 08:51:05,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 08:51:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:05,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:05,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:05,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:05,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1181149324, now seen corresponding path program 1 times [2020-10-28 08:51:05,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:05,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504913475] [2020-10-28 08:51:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:05,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:51:05,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-28 08:51:05,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:05,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:05,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:05,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:51:05,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:05,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504913475] [2020-10-28 08:51:05,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:05,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395854169] [2020-10-28 08:51:05,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:05,856 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-28 08:51:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:05,979 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-28 08:51:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:05,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 08:51:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:05,993 INFO L225 Difference]: With dead ends: 57 [2020-10-28 08:51:05,994 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:51:05,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:51:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-28 08:51:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:51:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-28 08:51:06,006 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2020-10-28 08:51:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:06,006 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-28 08:51:06,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-28 08:51:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:51:06,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:06,008 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] [2020-10-28 08:51:06,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:06,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash -873847476, now seen corresponding path program 1 times [2020-10-28 08:51:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:06,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810787716] [2020-10-28 08:51:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:51:06,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:51:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-28 08:51:06,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 08:51:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:06,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:06,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:06,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:06,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:51:06,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810787716] [2020-10-28 08:51:06,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:06,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138547898] [2020-10-28 08:51:06,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:06,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:06,929 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-10-28 08:51:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:07,051 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-10-28 08:51:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:07,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 08:51:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:07,053 INFO L225 Difference]: With dead ends: 65 [2020-10-28 08:51:07,053 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:51:07,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:51:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-28 08:51:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:51:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-28 08:51:07,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2020-10-28 08:51:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:07,064 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-28 08:51:07,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-28 08:51:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:51:07,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:07,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:07,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:07,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2092930672, now seen corresponding path program 2 times [2020-10-28 08:51:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:07,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767769884] [2020-10-28 08:51:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:07,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:51:10,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:51:10,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3240 [2020-10-28 08:51:10,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:10,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:10,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 08:51:10,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:10,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:10,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:10,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:51:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 08:51:10,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767769884] [2020-10-28 08:51:10,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:10,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:10,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845012682] [2020-10-28 08:51:10,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:10,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:10,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:10,452 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 6 states. [2020-10-28 08:51:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:10,624 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-10-28 08:51:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:10,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-28 08:51:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:10,627 INFO L225 Difference]: With dead ends: 72 [2020-10-28 08:51:10,627 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:51:10,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:51:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-28 08:51:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:51:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 08:51:10,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 28 [2020-10-28 08:51:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:10,656 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 08:51:10,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 08:51:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 08:51:10,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:10,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:10,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:10,658 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:10,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1329446158, now seen corresponding path program 3 times [2020-10-28 08:51:10,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:10,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541360356] [2020-10-28 08:51:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:12,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:14,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 08:51:14,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:51:14,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3929 [2020-10-28 08:51:14,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:14,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:14,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:14,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:14,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:14,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:14,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:14,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:14,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:14,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:14,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:14,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:14,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541360356] [2020-10-28 08:51:14,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:14,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:14,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986336270] [2020-10-28 08:51:14,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:14,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:14,716 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 6 states. [2020-10-28 08:51:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:14,864 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-28 08:51:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:14,864 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-28 08:51:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:14,865 INFO L225 Difference]: With dead ends: 63 [2020-10-28 08:51:14,866 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:51:14,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:51:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-28 08:51:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 08:51:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 08:51:14,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 30 [2020-10-28 08:51:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:14,877 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 08:51:14,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 08:51:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:51:14,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:14,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:14,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:14,880 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1647591071, now seen corresponding path program 1 times [2020-10-28 08:51:14,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:14,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782454388] [2020-10-28 08:51:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:51:19,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:51:19,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:51:19,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:19,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:19,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 08:51:19,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:19,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:19,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:19,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:51:19,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 08:51:19,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782454388] [2020-10-28 08:51:20,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:20,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:51:20,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688834012] [2020-10-28 08:51:20,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:20,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:20,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:20,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:20,004 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 5 states. [2020-10-28 08:51:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:20,144 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-28 08:51:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:20,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-28 08:51:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:20,147 INFO L225 Difference]: With dead ends: 65 [2020-10-28 08:51:20,147 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:51:20,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:51:20,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:51:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:51:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-28 08:51:20,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 33 [2020-10-28 08:51:20,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:20,163 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-28 08:51:20,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-28 08:51:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 08:51:20,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:20,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:20,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:20,166 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:20,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:20,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1889921372, now seen corresponding path program 2 times [2020-10-28 08:51:20,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:20,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175171477] [2020-10-28 08:51:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 08:51:25,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 08:51:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:51:25,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:25,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 08:51:25,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:25,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:25,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:25,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:25,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:25,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:25,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:51:25,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175171477] [2020-10-28 08:51:25,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:25,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:25,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967526815] [2020-10-28 08:51:25,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:25,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:25,278 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 7 states. [2020-10-28 08:51:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:25,413 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-28 08:51:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:25,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-28 08:51:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:25,414 INFO L225 Difference]: With dead ends: 69 [2020-10-28 08:51:25,415 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 08:51:25,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 08:51:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-28 08:51:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:51:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-28 08:51:25,430 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 36 [2020-10-28 08:51:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:25,431 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-28 08:51:25,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-28 08:51:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 08:51:25,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:25,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:25,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:25,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2105677187, now seen corresponding path program 3 times [2020-10-28 08:51:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:25,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382347188] [2020-10-28 08:51:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 08:51:30,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-28 08:51:30,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:51:30,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:30,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 08:51:30,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:30,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:30,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:30,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:30,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:30,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:30,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:51:30,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382347188] [2020-10-28 08:51:30,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:30,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:30,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76793396] [2020-10-28 08:51:30,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:30,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:30,571 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 9 states. [2020-10-28 08:51:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:30,769 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-28 08:51:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:30,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-28 08:51:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:30,771 INFO L225 Difference]: With dead ends: 79 [2020-10-28 08:51:30,771 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 08:51:30,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 08:51:30,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-28 08:51:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 08:51:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-28 08:51:30,787 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 42 [2020-10-28 08:51:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:30,787 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-28 08:51:30,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-28 08:51:30,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:51:30,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:30,790 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:30,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:30,791 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2052712950, now seen corresponding path program 4 times [2020-10-28 08:51:30,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:30,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838049601] [2020-10-28 08:51:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:51:35,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 08:51:35,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:51:35,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:35,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:35,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:51:35,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:35,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:35,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:35,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:35,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:35,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:35,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:35,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:35,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:35,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:51:35,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838049601] [2020-10-28 08:51:35,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:35,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544312968] [2020-10-28 08:51:35,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:35,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:35,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:35,938 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2020-10-28 08:51:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:36,086 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2020-10-28 08:51:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:36,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-28 08:51:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:36,088 INFO L225 Difference]: With dead ends: 110 [2020-10-28 08:51:36,088 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:51:36,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:51:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-28 08:51:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:51:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-10-28 08:51:36,108 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 45 [2020-10-28 08:51:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:36,108 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-10-28 08:51:36,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-10-28 08:51:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 08:51:36,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:36,109 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:36,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:36,110 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:36,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1283110342, now seen corresponding path program 5 times [2020-10-28 08:51:36,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:36,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469263961] [2020-10-28 08:51:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:36,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:38,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 08:51:41,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-28 08:51:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:51:41,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:51:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 08:51:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:41,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:41,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:41,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:51:41,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469263961] [2020-10-28 08:51:41,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:41,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641753244] [2020-10-28 08:51:41,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:41,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:41,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:41,244 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 9 states. [2020-10-28 08:51:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:41,390 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2020-10-28 08:51:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:41,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 08:51:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:41,391 INFO L225 Difference]: With dead ends: 130 [2020-10-28 08:51:41,391 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 08:51:41,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 08:51:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2020-10-28 08:51:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 08:51:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-28 08:51:41,402 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 56 [2020-10-28 08:51:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:41,403 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-28 08:51:41,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-28 08:51:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:51:41,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:41,404 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:41,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:41,404 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1212224270, now seen corresponding path program 6 times [2020-10-28 08:51:41,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307753345] [2020-10-28 08:51:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:44,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:44,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:44,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:46,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:51:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 08:51:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:51:46,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:46,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:51:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 08:51:46,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:46,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:46,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:46,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:46,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:46,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:46,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:46,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:46,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:46,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 90 proven. 59 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 08:51:46,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307753345] [2020-10-28 08:51:46,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:46,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:46,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371049536] [2020-10-28 08:51:46,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:46,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:46,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:46,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:46,544 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 11 states. [2020-10-28 08:51:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:46,816 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-10-28 08:51:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:46,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 08:51:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:46,818 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:51:46,819 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:51:46,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:51:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:51:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-28 08:51:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 08:51:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-10-28 08:51:46,843 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 67 [2020-10-28 08:51:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:46,843 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-10-28 08:51:46,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-10-28 08:51:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:51:46,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:46,847 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:46,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:46,847 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash 961604388, now seen corresponding path program 7 times [2020-10-28 08:51:46,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:46,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097678723] [2020-10-28 08:51:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:47,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:51:51,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:51:51,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:51:51,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:51,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:51,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 128 proven. 37 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-28 08:51:51,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097678723] [2020-10-28 08:51:51,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:51,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:51,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664887206] [2020-10-28 08:51:51,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:51,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:51,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:51,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:51,987 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 10 states. [2020-10-28 08:51:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:52,263 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2020-10-28 08:51:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:52,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-28 08:51:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:52,265 INFO L225 Difference]: With dead ends: 137 [2020-10-28 08:51:52,265 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:51:52,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:51:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:51:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 08:51:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 08:51:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2020-10-28 08:51:52,276 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 73 [2020-10-28 08:51:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:52,276 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2020-10-28 08:51:52,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2020-10-28 08:51:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:51:52,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:52,277 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:52,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:52,278 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash -916815018, now seen corresponding path program 8 times [2020-10-28 08:51:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:52,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611174556] [2020-10-28 08:51:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:52,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:52,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:51:57,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:51:57,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:51:57,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:57,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:51:57,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 08:51:57,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:57,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:57,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:57,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:57,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:57,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:57,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 5 proven. 251 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-28 08:51:57,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611174556] [2020-10-28 08:51:57,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:57,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:57,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424388776] [2020-10-28 08:51:57,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:57,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:57,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:57,420 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand 10 states. [2020-10-28 08:51:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:57,683 INFO L93 Difference]: Finished difference Result 228 states and 294 transitions. [2020-10-28 08:51:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:57,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-28 08:51:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:57,687 INFO L225 Difference]: With dead ends: 228 [2020-10-28 08:51:57,687 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 08:51:57,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:51:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 08:51:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 147. [2020-10-28 08:51:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 08:51:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2020-10-28 08:51:57,735 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 79 [2020-10-28 08:51:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:57,736 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2020-10-28 08:51:57,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2020-10-28 08:51:57,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:51:57,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:57,740 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:57,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:57,741 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1980254096, now seen corresponding path program 1 times [2020-10-28 08:51:57,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:57,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215383051] [2020-10-28 08:51:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:58,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:59,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:59,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:59,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:00,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:01,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:52:02,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 08:52:02,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:02,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:02,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:02,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:02,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:02,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:52:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-28 08:52:02,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215383051] [2020-10-28 08:52:02,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:02,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:52:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018528854] [2020-10-28 08:52:02,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:52:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:52:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:02,949 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand 10 states. [2020-10-28 08:52:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:03,196 INFO L93 Difference]: Finished difference Result 176 states and 223 transitions. [2020-10-28 08:52:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:52:03,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-28 08:52:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:03,198 INFO L225 Difference]: With dead ends: 176 [2020-10-28 08:52:03,199 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 08:52:03,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:52:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 08:52:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2020-10-28 08:52:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 08:52:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2020-10-28 08:52:03,233 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 81 [2020-10-28 08:52:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:03,235 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2020-10-28 08:52:03,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:52:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2020-10-28 08:52:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:52:03,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:03,237 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:03,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:52:03,237 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1080295405, now seen corresponding path program 9 times [2020-10-28 08:52:03,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:03,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823069505] [2020-10-28 08:52:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:03,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:05,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:06,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 08:52:08,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:08,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:08,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:08,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:08,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 294 proven. 118 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-28 08:52:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823069505] [2020-10-28 08:52:08,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:08,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:08,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492068924] [2020-10-28 08:52:08,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:08,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:08,412 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 13 states. [2020-10-28 08:52:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:09,030 INFO L93 Difference]: Finished difference Result 163 states and 206 transitions. [2020-10-28 08:52:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:52:09,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-10-28 08:52:09,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:09,034 INFO L225 Difference]: With dead ends: 163 [2020-10-28 08:52:09,034 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:52:09,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=524, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:52:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:52:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2020-10-28 08:52:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 08:52:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2020-10-28 08:52:09,064 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 93 [2020-10-28 08:52:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:09,065 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2020-10-28 08:52:09,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2020-10-28 08:52:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:52:09,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:09,067 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:09,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:52:09,067 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash -613815575, now seen corresponding path program 1 times [2020-10-28 08:52:09,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:09,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564416894] [2020-10-28 08:52:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:09,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:09,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:09,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:09,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:09,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:11,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:12,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:14,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:14,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:52:14,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 08:52:14,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:14,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:14,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:14,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:14,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:14,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:14,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:14,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:14,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 294 proven. 118 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-28 08:52:14,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564416894] [2020-10-28 08:52:14,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:14,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:14,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69140773] [2020-10-28 08:52:14,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:14,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:14,242 INFO L87 Difference]: Start difference. First operand 117 states and 147 transitions. Second operand 12 states. [2020-10-28 08:52:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:14,615 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2020-10-28 08:52:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:52:14,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 93 [2020-10-28 08:52:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:14,616 INFO L225 Difference]: With dead ends: 165 [2020-10-28 08:52:14,617 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 08:52:14,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 08:52:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2020-10-28 08:52:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-28 08:52:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2020-10-28 08:52:14,630 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 93 [2020-10-28 08:52:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:14,630 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2020-10-28 08:52:14,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2020-10-28 08:52:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:52:14,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:14,634 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:14,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:52:14,634 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:14,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:14,635 INFO L82 PathProgramCache]: Analyzing trace with hash 371876731, now seen corresponding path program 10 times [2020-10-28 08:52:14,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:14,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934238736] [2020-10-28 08:52:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:14,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:14,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:16,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:17,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:19,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:19,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:52:19,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 08:52:19,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:52:19,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:19,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:19,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:19,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:19,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 08:52:19,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:19,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:19,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:19,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:19,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:19,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:19,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:19,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:19,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 327 proven. 186 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-28 08:52:19,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934238736] [2020-10-28 08:52:19,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:19,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:19,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340977923] [2020-10-28 08:52:19,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:19,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:19,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:19,821 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 14 states. [2020-10-28 08:52:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:20,250 INFO L93 Difference]: Finished difference Result 166 states and 211 transitions. [2020-10-28 08:52:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:52:20,250 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-28 08:52:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:20,252 INFO L225 Difference]: With dead ends: 166 [2020-10-28 08:52:20,252 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 08:52:20,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=648, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:52:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 08:52:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 08:52:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 08:52:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2020-10-28 08:52:20,280 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 99 [2020-10-28 08:52:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:20,281 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2020-10-28 08:52:20,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2020-10-28 08:52:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 08:52:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:20,282 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:20,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:52:20,283 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1048253098, now seen corresponding path program 11 times [2020-10-28 08:52:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:20,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907189189] [2020-10-28 08:52:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:20,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:23,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:25,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:25,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:52:25,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 08:52:25,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:25,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:25,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:25,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:25,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:25,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:25,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:25,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:25,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:25,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 9 proven. 631 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-28 08:52:25,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907189189] [2020-10-28 08:52:25,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:25,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:25,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328542546] [2020-10-28 08:52:25,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:25,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:25,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:25,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:25,432 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 11 states. [2020-10-28 08:52:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:25,737 INFO L93 Difference]: Finished difference Result 323 states and 420 transitions. [2020-10-28 08:52:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:52:25,737 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2020-10-28 08:52:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:25,740 INFO L225 Difference]: With dead ends: 323 [2020-10-28 08:52:25,740 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 08:52:25,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 08:52:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 209. [2020-10-28 08:52:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-28 08:52:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 270 transitions. [2020-10-28 08:52:25,767 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 270 transitions. Word has length 108 [2020-10-28 08:52:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:25,768 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 270 transitions. [2020-10-28 08:52:25,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 270 transitions. [2020-10-28 08:52:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 08:52:25,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:25,770 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:25,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:52:25,770 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1683449400, now seen corresponding path program 2 times [2020-10-28 08:52:25,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:25,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736650956] [2020-10-28 08:52:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:25,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:25,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:25,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:30,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:30,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 08:52:30,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:30,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:30,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:30,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:30,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:30,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:30,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:30,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:30,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:30,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:30,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:30,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:30,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-28 08:52:30,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736650956] [2020-10-28 08:52:30,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:30,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:30,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021104020] [2020-10-28 08:52:30,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:30,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:30,953 INFO L87 Difference]: Start difference. First operand 209 states and 270 transitions. Second operand 11 states. [2020-10-28 08:52:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:31,135 INFO L93 Difference]: Finished difference Result 244 states and 313 transitions. [2020-10-28 08:52:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:31,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 110 [2020-10-28 08:52:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:31,138 INFO L225 Difference]: With dead ends: 244 [2020-10-28 08:52:31,138 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 08:52:31,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 08:52:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 134. [2020-10-28 08:52:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-28 08:52:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 169 transitions. [2020-10-28 08:52:31,152 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 169 transitions. Word has length 110 [2020-10-28 08:52:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:31,153 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 169 transitions. [2020-10-28 08:52:31,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 169 transitions. [2020-10-28 08:52:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 08:52:31,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:31,154 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:31,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:52:31,155 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2109612891, now seen corresponding path program 12 times [2020-10-28 08:52:31,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:31,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611961224] [2020-10-28 08:52:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:31,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:36,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-28 08:52:36,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 08:52:36,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:36,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:36,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 9 proven. 1000 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-10-28 08:52:36,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611961224] [2020-10-28 08:52:36,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:36,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:36,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377592586] [2020-10-28 08:52:36,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:36,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:36,326 INFO L87 Difference]: Start difference. First operand 134 states and 169 transitions. Second operand 12 states. [2020-10-28 08:52:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:36,680 INFO L93 Difference]: Finished difference Result 379 states and 494 transitions. [2020-10-28 08:52:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:52:36,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 128 [2020-10-28 08:52:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:36,682 INFO L225 Difference]: With dead ends: 379 [2020-10-28 08:52:36,682 INFO L226 Difference]: Without dead ends: 266 [2020-10-28 08:52:36,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-28 08:52:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 247. [2020-10-28 08:52:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-28 08:52:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2020-10-28 08:52:36,707 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 128 [2020-10-28 08:52:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:36,707 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2020-10-28 08:52:36,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2020-10-28 08:52:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 08:52:36,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:36,709 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:36,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:52:36,709 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1319320705, now seen corresponding path program 3 times [2020-10-28 08:52:36,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:36,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453905610] [2020-10-28 08:52:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:39,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:41,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 08:52:41,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 08:52:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:52:41,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:41,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:41,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 08:52:41,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:41,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:41,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:41,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:41,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:41,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:41,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:41,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:41,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:41,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 644 proven. 391 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-10-28 08:52:41,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453905610] [2020-10-28 08:52:41,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:41,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:41,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412900869] [2020-10-28 08:52:41,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:41,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:41,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:41,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:41,947 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand 16 states. [2020-10-28 08:52:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:42,705 INFO L93 Difference]: Finished difference Result 301 states and 393 transitions. [2020-10-28 08:52:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:52:42,705 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 130 [2020-10-28 08:52:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:42,710 INFO L225 Difference]: With dead ends: 301 [2020-10-28 08:52:42,711 INFO L226 Difference]: Without dead ends: 266 [2020-10-28 08:52:42,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:52:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-28 08:52:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 256. [2020-10-28 08:52:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-28 08:52:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 332 transitions. [2020-10-28 08:52:42,739 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 332 transitions. Word has length 130 [2020-10-28 08:52:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:42,739 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 332 transitions. [2020-10-28 08:52:42,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 332 transitions. [2020-10-28 08:52:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 08:52:42,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:42,742 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:42,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:52:42,742 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:42,742 INFO L82 PathProgramCache]: Analyzing trace with hash -384254800, now seen corresponding path program 4 times [2020-10-28 08:52:42,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:42,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652798250] [2020-10-28 08:52:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:42,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:43,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:43,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:43,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:44,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:45,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:45,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:47,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:52:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:47,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 08:52:47,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:47,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:47,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:47,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:47,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 794 proven. 305 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-28 08:52:47,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652798250] [2020-10-28 08:52:47,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:47,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:52:47,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475162178] [2020-10-28 08:52:47,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:52:47,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:47,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:52:47,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:52:47,980 INFO L87 Difference]: Start difference. First operand 256 states and 332 transitions. Second operand 15 states. [2020-10-28 08:52:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:48,665 INFO L93 Difference]: Finished difference Result 342 states and 445 transitions. [2020-10-28 08:52:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:52:48,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2020-10-28 08:52:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:48,669 INFO L225 Difference]: With dead ends: 342 [2020-10-28 08:52:48,669 INFO L226 Difference]: Without dead ends: 262 [2020-10-28 08:52:48,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=421, Invalid=839, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 08:52:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-28 08:52:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-10-28 08:52:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 08:52:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 340 transitions. [2020-10-28 08:52:48,693 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 340 transitions. Word has length 133 [2020-10-28 08:52:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:48,694 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 340 transitions. [2020-10-28 08:52:48,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:52:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 340 transitions. [2020-10-28 08:52:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 08:52:48,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:48,696 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:48,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:52:48,696 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1998760557, now seen corresponding path program 5 times [2020-10-28 08:52:48,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:48,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638291772] [2020-10-28 08:52:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:48,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:49,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:53,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:53,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 08:52:53,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 08:52:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:53,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:53,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:53,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:53,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:53,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:53,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:53,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:53,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:53,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:53,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:53,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:53,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 694 proven. 492 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-28 08:52:53,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638291772] [2020-10-28 08:52:53,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:53,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:52:53,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409112386] [2020-10-28 08:52:53,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:52:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:52:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:53,957 INFO L87 Difference]: Start difference. First operand 262 states and 340 transitions. Second operand 17 states. [2020-10-28 08:52:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:54,848 INFO L93 Difference]: Finished difference Result 309 states and 402 transitions. [2020-10-28 08:52:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 08:52:54,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 136 [2020-10-28 08:52:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:54,851 INFO L225 Difference]: With dead ends: 309 [2020-10-28 08:52:54,851 INFO L226 Difference]: Without dead ends: 271 [2020-10-28 08:52:54,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=661, Invalid=1319, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 08:52:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-28 08:52:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-10-28 08:52:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-28 08:52:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 352 transitions. [2020-10-28 08:52:54,874 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 352 transitions. Word has length 136 [2020-10-28 08:52:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:54,874 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 352 transitions. [2020-10-28 08:52:54,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:52:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 352 transitions. [2020-10-28 08:52:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 08:52:54,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:54,877 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:54,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:52:54,877 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash -670813602, now seen corresponding path program 6 times [2020-10-28 08:52:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:54,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799118559] [2020-10-28 08:52:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:54,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:55,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:56,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:59,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:59,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:59,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:59,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-28 08:52:59,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:00,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:00,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1204 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-28 08:53:00,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799118559] [2020-10-28 08:53:00,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:00,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:53:00,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583692703] [2020-10-28 08:53:00,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:53:00,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:53:00,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:00,091 INFO L87 Difference]: Start difference. First operand 271 states and 352 transitions. Second operand 12 states. [2020-10-28 08:53:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:00,321 INFO L93 Difference]: Finished difference Result 312 states and 403 transitions. [2020-10-28 08:53:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:53:00,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2020-10-28 08:53:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:00,323 INFO L225 Difference]: With dead ends: 312 [2020-10-28 08:53:00,323 INFO L226 Difference]: Without dead ends: 297 [2020-10-28 08:53:00,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:53:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-28 08:53:00,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 169. [2020-10-28 08:53:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 08:53:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 215 transitions. [2020-10-28 08:53:00,338 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 215 transitions. Word has length 139 [2020-10-28 08:53:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:00,339 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 215 transitions. [2020-10-28 08:53:00,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:53:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 215 transitions. [2020-10-28 08:53:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 08:53:00,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:00,340 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:00,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:53:00,341 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:00,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1238145833, now seen corresponding path program 13 times [2020-10-28 08:53:00,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:00,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537754344] [2020-10-28 08:53:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:00,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:02,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 08:53:05,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 08:53:05,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:53:05,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:05,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:53:05,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 08:53:05,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:05,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:05,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:05,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:05,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 13 proven. 1891 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-10-28 08:53:05,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537754344] [2020-10-28 08:53:05,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:05,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:05,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458993096] [2020-10-28 08:53:05,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:05,536 INFO L87 Difference]: Start difference. First operand 169 states and 215 transitions. Second operand 13 states. [2020-10-28 08:53:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:05,919 INFO L93 Difference]: Finished difference Result 492 states and 644 transitions. [2020-10-28 08:53:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:53:05,919 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 163 [2020-10-28 08:53:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:05,922 INFO L225 Difference]: With dead ends: 492 [2020-10-28 08:53:05,922 INFO L226 Difference]: Without dead ends: 346 [2020-10-28 08:53:05,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:53:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-28 08:53:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 321. [2020-10-28 08:53:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-28 08:53:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 418 transitions. [2020-10-28 08:53:05,949 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 418 transitions. Word has length 163 [2020-10-28 08:53:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:05,949 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 418 transitions. [2020-10-28 08:53:05,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 418 transitions. [2020-10-28 08:53:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 08:53:05,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:05,952 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:05,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:53:05,952 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1062843955, now seen corresponding path program 7 times [2020-10-28 08:53:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:05,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022357013] [2020-10-28 08:53:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:10,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:53:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 08:53:10,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:11,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:11,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:11,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2238 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2020-10-28 08:53:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022357013] [2020-10-28 08:53:11,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:11,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:11,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849216401] [2020-10-28 08:53:11,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:11,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:11,196 INFO L87 Difference]: Start difference. First operand 321 states and 418 transitions. Second operand 13 states. [2020-10-28 08:53:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:11,435 INFO L93 Difference]: Finished difference Result 362 states and 469 transitions. [2020-10-28 08:53:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:53:11,435 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2020-10-28 08:53:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:11,438 INFO L225 Difference]: With dead ends: 362 [2020-10-28 08:53:11,438 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 08:53:11,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 08:53:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2020-10-28 08:53:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 08:53:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 249 transitions. [2020-10-28 08:53:11,456 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 249 transitions. Word has length 165 [2020-10-28 08:53:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:11,456 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 249 transitions. [2020-10-28 08:53:11,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 249 transitions. [2020-10-28 08:53:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 08:53:11,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:11,459 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:11,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:53:11,459 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash 687765038, now seen corresponding path program 14 times [2020-10-28 08:53:11,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:11,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729099623] [2020-10-28 08:53:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:11,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:11,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:12,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:16,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:53:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:53:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:16,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:16,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:16,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:16,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:16,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:16,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:16,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:16,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:16,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3078 trivial. 0 not checked. [2020-10-28 08:53:16,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729099623] [2020-10-28 08:53:16,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:16,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:53:16,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522794897] [2020-10-28 08:53:16,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:53:16,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:16,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:53:16,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:16,637 INFO L87 Difference]: Start difference. First operand 195 states and 249 transitions. Second operand 13 states. [2020-10-28 08:53:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:16,817 INFO L93 Difference]: Finished difference Result 391 states and 507 transitions. [2020-10-28 08:53:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:53:16,818 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 189 [2020-10-28 08:53:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:16,820 INFO L225 Difference]: With dead ends: 391 [2020-10-28 08:53:16,820 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 08:53:16,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:53:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 08:53:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2020-10-28 08:53:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-28 08:53:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 251 transitions. [2020-10-28 08:53:16,839 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 251 transitions. Word has length 189 [2020-10-28 08:53:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:16,839 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 251 transitions. [2020-10-28 08:53:16,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:53:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 251 transitions. [2020-10-28 08:53:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 08:53:16,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:16,841 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:16,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:53:16,841 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:16,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash 49869068, now seen corresponding path program 15 times [2020-10-28 08:53:16,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:16,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672813205] [2020-10-28 08:53:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:16,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:17,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:21,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:21,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 08:53:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:22,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:22,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3178 backedges. 2068 proven. 742 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-10-28 08:53:22,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672813205] [2020-10-28 08:53:22,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:22,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:53:22,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610924361] [2020-10-28 08:53:22,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:53:22,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:53:22,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:53:22,164 INFO L87 Difference]: Start difference. First operand 197 states and 251 transitions. Second operand 20 states. [2020-10-28 08:53:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:23,842 INFO L93 Difference]: Finished difference Result 355 states and 458 transitions. [2020-10-28 08:53:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-28 08:53:23,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 191 [2020-10-28 08:53:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:23,846 INFO L225 Difference]: With dead ends: 355 [2020-10-28 08:53:23,846 INFO L226 Difference]: Without dead ends: 314 [2020-10-28 08:53:23,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1929, Invalid=4877, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 08:53:23,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-28 08:53:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 239. [2020-10-28 08:53:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-28 08:53:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 307 transitions. [2020-10-28 08:53:23,872 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 307 transitions. Word has length 191 [2020-10-28 08:53:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:23,873 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 307 transitions. [2020-10-28 08:53:23,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:53:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 307 transitions. [2020-10-28 08:53:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-28 08:53:23,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:23,874 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 28, 14, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:23,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:53:23,875 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:23,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2135560712, now seen corresponding path program 2 times [2020-10-28 08:53:23,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:23,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887240656] [2020-10-28 08:53:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:23,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:28,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-28 08:53:28,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:29,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:29,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:29,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:29,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:29,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3178 backedges. 2068 proven. 742 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-10-28 08:53:29,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887240656] [2020-10-28 08:53:29,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:29,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:53:29,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846282981] [2020-10-28 08:53:29,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:53:29,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:29,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:53:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:29,224 INFO L87 Difference]: Start difference. First operand 239 states and 307 transitions. Second operand 19 states. [2020-10-28 08:53:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:30,380 INFO L93 Difference]: Finished difference Result 305 states and 392 transitions. [2020-10-28 08:53:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 08:53:30,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2020-10-28 08:53:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:30,383 INFO L225 Difference]: With dead ends: 305 [2020-10-28 08:53:30,383 INFO L226 Difference]: Without dead ends: 243 [2020-10-28 08:53:30,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=991, Invalid=1979, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 08:53:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-28 08:53:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 203. [2020-10-28 08:53:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 08:53:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 259 transitions. [2020-10-28 08:53:30,402 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 259 transitions. Word has length 191 [2020-10-28 08:53:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:30,402 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 259 transitions. [2020-10-28 08:53:30,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:53:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 259 transitions. [2020-10-28 08:53:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 08:53:30,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:30,404 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:30,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:53:30,404 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:30,405 INFO L82 PathProgramCache]: Analyzing trace with hash 625077338, now seen corresponding path program 16 times [2020-10-28 08:53:30,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:30,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295849303] [2020-10-28 08:53:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:30,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:35,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:35,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 08:53:35,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 08:53:35,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:53:35,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:35,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:35,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:53:35,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:35,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 08:53:35,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:35,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:35,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:35,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:35,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:35,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3451 backedges. 15 proven. 2971 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-28 08:53:35,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295849303] [2020-10-28 08:53:35,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:35,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:53:35,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140660329] [2020-10-28 08:53:35,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:53:35,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:53:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:35,649 INFO L87 Difference]: Start difference. First operand 203 states and 259 transitions. Second operand 14 states. [2020-10-28 08:53:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:36,076 INFO L93 Difference]: Finished difference Result 429 states and 558 transitions. [2020-10-28 08:53:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:53:36,077 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 197 [2020-10-28 08:53:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:36,079 INFO L225 Difference]: With dead ends: 429 [2020-10-28 08:53:36,080 INFO L226 Difference]: Without dead ends: 414 [2020-10-28 08:53:36,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:53:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-10-28 08:53:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 386. [2020-10-28 08:53:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-28 08:53:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 504 transitions. [2020-10-28 08:53:36,115 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 504 transitions. Word has length 197 [2020-10-28 08:53:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:36,116 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 504 transitions. [2020-10-28 08:53:36,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:53:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 504 transitions. [2020-10-28 08:53:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 08:53:36,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:36,118 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:36,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:53:36,118 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:36,119 INFO L82 PathProgramCache]: Analyzing trace with hash -656307238, now seen corresponding path program 8 times [2020-10-28 08:53:36,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:36,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901131026] [2020-10-28 08:53:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:36,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:36,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:39,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:53:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-28 08:53:41,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:41,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:41,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:41,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:41,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:41,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:41,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:41,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:41,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:41,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:41,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:41,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3451 backedges. 0 proven. 2971 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-28 08:53:41,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901131026] [2020-10-28 08:53:41,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:41,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:53:41,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229909866] [2020-10-28 08:53:41,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:53:41,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:41,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:53:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:41,422 INFO L87 Difference]: Start difference. First operand 386 states and 504 transitions. Second operand 14 states. [2020-10-28 08:53:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:41,687 INFO L93 Difference]: Finished difference Result 430 states and 559 transitions. [2020-10-28 08:53:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:53:41,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 197 [2020-10-28 08:53:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:41,691 INFO L225 Difference]: With dead ends: 430 [2020-10-28 08:53:41,691 INFO L226 Difference]: Without dead ends: 415 [2020-10-28 08:53:41,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:53:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-28 08:53:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 230. [2020-10-28 08:53:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 08:53:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 295 transitions. [2020-10-28 08:53:41,714 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 295 transitions. Word has length 197 [2020-10-28 08:53:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:41,714 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 295 transitions. [2020-10-28 08:53:41,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:53:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 295 transitions. [2020-10-28 08:53:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 08:53:41,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:41,716 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:41,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:53:41,716 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 739308128, now seen corresponding path program 17 times [2020-10-28 08:53:41,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:41,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122427441] [2020-10-28 08:53:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:41,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:41,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:46,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 08:53:46,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:53:46,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:53:46,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:46,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:46,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:46,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:53:46,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-28 08:53:46,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:46,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:46,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:46,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:46,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:46,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:46,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:46,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:46,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:46,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:46,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:46,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4743 backedges. 15 proven. 4171 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2020-10-28 08:53:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122427441] [2020-10-28 08:53:47,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:47,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:47,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219548031] [2020-10-28 08:53:47,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:47,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:47,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:47,067 INFO L87 Difference]: Start difference. First operand 230 states and 295 transitions. Second operand 15 states. [2020-10-28 08:53:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:47,536 INFO L93 Difference]: Finished difference Result 673 states and 884 transitions. [2020-10-28 08:53:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:53:47,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 224 [2020-10-28 08:53:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:47,540 INFO L225 Difference]: With dead ends: 673 [2020-10-28 08:53:47,540 INFO L226 Difference]: Without dead ends: 470 [2020-10-28 08:53:47,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-28 08:53:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 442. [2020-10-28 08:53:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-28 08:53:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 578 transitions. [2020-10-28 08:53:47,579 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 578 transitions. Word has length 224 [2020-10-28 08:53:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:47,580 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 578 transitions. [2020-10-28 08:53:47,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 578 transitions. [2020-10-28 08:53:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 08:53:47,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:47,582 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:47,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:53:47,582 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash -373659582, now seen corresponding path program 9 times [2020-10-28 08:53:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:47,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093308357] [2020-10-28 08:53:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:47,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:47,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:47,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:51,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:52,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 08:53:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:52,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:52,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:52,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:52,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:52,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:52,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:52,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:52,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:52,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:53:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4764 backedges. 3197 proven. 1064 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2020-10-28 08:53:53,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093308357] [2020-10-28 08:53:53,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:53,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:53:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958678786] [2020-10-28 08:53:53,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:53:53,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:53:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:53:53,103 INFO L87 Difference]: Start difference. First operand 442 states and 578 transitions. Second operand 21 states. [2020-10-28 08:53:54,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:54,525 INFO L93 Difference]: Finished difference Result 555 states and 730 transitions. [2020-10-28 08:53:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 08:53:54,526 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 226 [2020-10-28 08:53:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:54,529 INFO L225 Difference]: With dead ends: 555 [2020-10-28 08:53:54,529 INFO L226 Difference]: Without dead ends: 457 [2020-10-28 08:53:54,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=2859, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 08:53:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-10-28 08:53:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2020-10-28 08:53:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-28 08:53:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 598 transitions. [2020-10-28 08:53:54,575 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 598 transitions. Word has length 226 [2020-10-28 08:53:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:54,575 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 598 transitions. [2020-10-28 08:53:54,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:53:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 598 transitions. [2020-10-28 08:53:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-28 08:53:54,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:54,578 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:54,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:53:54,578 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash -387435024, now seen corresponding path program 10 times [2020-10-28 08:53:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:54,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254784453] [2020-10-28 08:53:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:54,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:59,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:59,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-28 08:53:59,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:53:59,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:53:59,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:59,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:53:59,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-28 08:53:59,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:59,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:59,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:59,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:59,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:59,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:59,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:59,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:59,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:59,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:59,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:59,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:59,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5099 backedges. 0 proven. 4456 refuted. 0 times theorem prover too weak. 643 trivial. 0 not checked. [2020-10-28 08:54:00,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254784453] [2020-10-28 08:54:00,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:00,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:54:00,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187327350] [2020-10-28 08:54:00,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:54:00,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:54:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:54:00,039 INFO L87 Difference]: Start difference. First operand 457 states and 598 transitions. Second operand 15 states. [2020-10-28 08:54:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:00,351 INFO L93 Difference]: Finished difference Result 504 states and 657 transitions. [2020-10-28 08:54:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:54:00,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 232 [2020-10-28 08:54:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:00,354 INFO L225 Difference]: With dead ends: 504 [2020-10-28 08:54:00,354 INFO L226 Difference]: Without dead ends: 489 [2020-10-28 08:54:00,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:54:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-28 08:54:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 268. [2020-10-28 08:54:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-28 08:54:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 345 transitions. [2020-10-28 08:54:00,384 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 345 transitions. Word has length 232 [2020-10-28 08:54:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:00,384 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 345 transitions. [2020-10-28 08:54:00,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:54:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 345 transitions. [2020-10-28 08:54:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-28 08:54:00,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:00,387 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:00,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:54:00,387 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 2073057741, now seen corresponding path program 18 times [2020-10-28 08:54:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:00,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518368402] [2020-10-28 08:54:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:05,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:05,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-28 08:54:05,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:54:05,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:54:05,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:05,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:05,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:54:05,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:05,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:54:05,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:05,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:05,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:05,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:05,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:05,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:05,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:05,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6849 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2020-10-28 08:54:05,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518368402] [2020-10-28 08:54:05,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:05,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:54:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682588093] [2020-10-28 08:54:05,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:54:05,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:54:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:54:05,655 INFO L87 Difference]: Start difference. First operand 268 states and 345 transitions. Second operand 15 states. [2020-10-28 08:54:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:05,885 INFO L93 Difference]: Finished difference Result 539 states and 703 transitions. [2020-10-28 08:54:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:54:05,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 262 [2020-10-28 08:54:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:05,887 INFO L225 Difference]: With dead ends: 539 [2020-10-28 08:54:05,887 INFO L226 Difference]: Without dead ends: 300 [2020-10-28 08:54:05,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:54:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-28 08:54:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2020-10-28 08:54:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-28 08:54:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 347 transitions. [2020-10-28 08:54:05,914 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 347 transitions. Word has length 262 [2020-10-28 08:54:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:05,914 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 347 transitions. [2020-10-28 08:54:05,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:54:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 347 transitions. [2020-10-28 08:54:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 08:54:05,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:05,917 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:05,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:54:05,917 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash -813225809, now seen corresponding path program 19 times [2020-10-28 08:54:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:05,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763861487] [2020-10-28 08:54:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:05,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:54:10,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:10,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-28 08:54:10,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:11,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:11,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:11,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:11,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:11,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:11,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:11,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 4737 proven. 1467 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2020-10-28 08:54:11,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763861487] [2020-10-28 08:54:11,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:11,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:54:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981501365] [2020-10-28 08:54:11,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:54:11,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:11,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:54:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:54:11,346 INFO L87 Difference]: Start difference. First operand 270 states and 347 transitions. Second operand 24 states. [2020-10-28 08:54:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:14,202 INFO L93 Difference]: Finished difference Result 493 states and 640 transitions. [2020-10-28 08:54:14,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-28 08:54:14,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 264 [2020-10-28 08:54:14,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:14,206 INFO L225 Difference]: With dead ends: 493 [2020-10-28 08:54:14,207 INFO L226 Difference]: Without dead ends: 446 [2020-10-28 08:54:14,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4546 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4175, Invalid=10831, Unknown=0, NotChecked=0, Total=15006 [2020-10-28 08:54:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-28 08:54:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 324. [2020-10-28 08:54:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-28 08:54:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 419 transitions. [2020-10-28 08:54:14,245 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 419 transitions. Word has length 264 [2020-10-28 08:54:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:14,245 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 419 transitions. [2020-10-28 08:54:14,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:54:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 419 transitions. [2020-10-28 08:54:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 08:54:14,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:14,247 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 45, 18, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:14,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:54:14,248 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash 512545963, now seen corresponding path program 3 times [2020-10-28 08:54:14,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:14,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554275667] [2020-10-28 08:54:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:14,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:14,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:14,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:14,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:19,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-28 08:54:19,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:54:19,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:54:19,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:19,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:54:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-28 08:54:19,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 4737 proven. 1467 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2020-10-28 08:54:19,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554275667] [2020-10-28 08:54:19,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:19,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:54:19,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396145663] [2020-10-28 08:54:19,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:54:19,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:19,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:54:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:54:19,685 INFO L87 Difference]: Start difference. First operand 324 states and 419 transitions. Second operand 23 states. [2020-10-28 08:54:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:21,417 INFO L93 Difference]: Finished difference Result 402 states and 520 transitions. [2020-10-28 08:54:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-28 08:54:21,418 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 264 [2020-10-28 08:54:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:21,421 INFO L225 Difference]: With dead ends: 402 [2020-10-28 08:54:21,421 INFO L226 Difference]: Without dead ends: 328 [2020-10-28 08:54:21,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2003, Invalid=4003, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 08:54:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-28 08:54:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 276. [2020-10-28 08:54:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 08:54:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 355 transitions. [2020-10-28 08:54:21,451 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 355 transitions. Word has length 264 [2020-10-28 08:54:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:21,452 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 355 transitions. [2020-10-28 08:54:21,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:54:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 355 transitions. [2020-10-28 08:54:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 08:54:21,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:21,454 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:21,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:54:21,455 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash -143883459, now seen corresponding path program 20 times [2020-10-28 08:54:21,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:21,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638907419] [2020-10-28 08:54:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:22,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:23,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:26,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:26,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-28 08:54:26,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:54:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:54:26,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:26,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:54:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 230 [2020-10-28 08:54:26,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:26,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:26,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:26,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:26,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:26,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:26,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:26,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:26,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:26,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:26,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:26,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:26,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 19 proven. 6436 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-10-28 08:54:26,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638907419] [2020-10-28 08:54:26,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:26,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:54:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006138031] [2020-10-28 08:54:26,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:54:26,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:54:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:26,808 INFO L87 Difference]: Start difference. First operand 276 states and 355 transitions. Second operand 16 states. [2020-10-28 08:54:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:27,295 INFO L93 Difference]: Finished difference Result 583 states and 762 transitions. [2020-10-28 08:54:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:54:27,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 270 [2020-10-28 08:54:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:27,298 INFO L225 Difference]: With dead ends: 583 [2020-10-28 08:54:27,299 INFO L226 Difference]: Without dead ends: 568 [2020-10-28 08:54:27,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-10-28 08:54:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 534. [2020-10-28 08:54:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-10-28 08:54:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 700 transitions. [2020-10-28 08:54:27,348 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 700 transitions. Word has length 270 [2020-10-28 08:54:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:27,348 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 700 transitions. [2020-10-28 08:54:27,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:54:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 700 transitions. [2020-10-28 08:54:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-28 08:54:27,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:27,351 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:27,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:54:27,351 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1930565765, now seen corresponding path program 11 times [2020-10-28 08:54:27,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:27,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937006381] [2020-10-28 08:54:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:27,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:28,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:29,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:32,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 230 [2020-10-28 08:54:32,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:32,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:32,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:32,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:32,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 0 proven. 6436 refuted. 0 times theorem prover too weak. 839 trivial. 0 not checked. [2020-10-28 08:54:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937006381] [2020-10-28 08:54:32,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:32,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:54:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429701023] [2020-10-28 08:54:32,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:54:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:54:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:32,770 INFO L87 Difference]: Start difference. First operand 534 states and 700 transitions. Second operand 16 states. [2020-10-28 08:54:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:33,112 INFO L93 Difference]: Finished difference Result 584 states and 763 transitions. [2020-10-28 08:54:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:54:33,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 270 [2020-10-28 08:54:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:33,115 INFO L225 Difference]: With dead ends: 584 [2020-10-28 08:54:33,115 INFO L226 Difference]: Without dead ends: 569 [2020-10-28 08:54:33,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-28 08:54:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 309. [2020-10-28 08:54:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-28 08:54:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 399 transitions. [2020-10-28 08:54:33,148 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 399 transitions. Word has length 270 [2020-10-28 08:54:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:33,149 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 399 transitions. [2020-10-28 08:54:33,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:54:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 399 transitions. [2020-10-28 08:54:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 08:54:33,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:33,151 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:33,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:54:33,151 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1291587843, now seen corresponding path program 21 times [2020-10-28 08:54:33,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:33,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042019791] [2020-10-28 08:54:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:33,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:33,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:33,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:33,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:34,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:38,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:54:38,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:38,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:38,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:38,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:38,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:38,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:38,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 9435 trivial. 0 not checked. [2020-10-28 08:54:38,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042019791] [2020-10-28 08:54:38,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:38,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:54:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482236796] [2020-10-28 08:54:38,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:54:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:54:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:38,445 INFO L87 Difference]: Start difference. First operand 309 states and 399 transitions. Second operand 16 states. [2020-10-28 08:54:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:38,696 INFO L93 Difference]: Finished difference Result 622 states and 813 transitions. [2020-10-28 08:54:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:54:38,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 303 [2020-10-28 08:54:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:38,698 INFO L225 Difference]: With dead ends: 622 [2020-10-28 08:54:38,698 INFO L226 Difference]: Without dead ends: 344 [2020-10-28 08:54:38,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:54:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-28 08:54:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 311. [2020-10-28 08:54:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-28 08:54:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 401 transitions. [2020-10-28 08:54:38,731 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 401 transitions. Word has length 303 [2020-10-28 08:54:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:38,731 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 401 transitions. [2020-10-28 08:54:38,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:54:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 401 transitions. [2020-10-28 08:54:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 08:54:38,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:38,733 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:38,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:54:38,733 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1008351653, now seen corresponding path program 22 times [2020-10-28 08:54:38,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:38,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109809210] [2020-10-28 08:54:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:39,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:43,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:43,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 08:54:43,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:54:43,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:54:43,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:43,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:43,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:54:43,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:54:43,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-28 08:54:43,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:44,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:44,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:44,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:44,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 6778 proven. 1960 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2020-10-28 08:54:44,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109809210] [2020-10-28 08:54:44,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:44,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:54:44,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253627696] [2020-10-28 08:54:44,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:54:44,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:44,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:54:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:54:44,233 INFO L87 Difference]: Start difference. First operand 311 states and 401 transitions. Second operand 26 states. [2020-10-28 08:54:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:47,818 INFO L93 Difference]: Finished difference Result 571 states and 743 transitions. [2020-10-28 08:54:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-10-28 08:54:47,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 305 [2020-10-28 08:54:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:47,822 INFO L225 Difference]: With dead ends: 571 [2020-10-28 08:54:47,822 INFO L226 Difference]: Without dead ends: 521 [2020-10-28 08:54:47,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5846, Invalid=15324, Unknown=0, NotChecked=0, Total=21170 [2020-10-28 08:54:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-28 08:54:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 371. [2020-10-28 08:54:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-28 08:54:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 481 transitions. [2020-10-28 08:54:47,858 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 481 transitions. Word has length 305 [2020-10-28 08:54:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:47,858 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 481 transitions. [2020-10-28 08:54:47,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:54:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 481 transitions. [2020-10-28 08:54:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 08:54:47,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:47,860 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 55, 20, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:47,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:54:47,861 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1584640421, now seen corresponding path program 4 times [2020-10-28 08:54:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:47,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953035021] [2020-10-28 08:54:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking...