/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_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:02:45,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:02:45,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:02:45,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:02:45,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:02:45,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:02:45,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:02:45,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:02:45,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:02:45,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:02:45,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:02:45,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:02:45,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:02:45,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:02:45,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:02:45,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:02:45,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:02:45,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:02:45,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:02:45,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:02:45,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:02:45,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:02:45,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:02:45,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:02:45,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:02:45,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:02:45,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:02:45,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:02:45,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:02:45,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:02:45,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:02:45,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:02:45,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:02:45,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:02:45,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:02:45,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:02:45,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:02:45,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:02:45,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:02:45,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:02:45,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:02:45,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:02:45,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:02:45,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:02:45,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:02:45,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:02:45,650 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:02:45,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:02:45,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:02:45,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:02:45,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:02:45,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:02:45,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:02:45,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:02:45,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:02:45,653 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:02:45,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:02:45,653 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:02:45,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:02:45,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:02:45,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:02:45,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:02:45,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:02:45,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:45,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:02:45,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:02:45,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:02:45,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:02:45,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:02:45,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:02:45,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:02:45,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:02:46,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:02:46,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:02:46,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:02:46,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:02:46,176 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:02:46,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-28 09:02:46,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/245e7e04f/99ffc53dac374748b839de877a59d143/FLAG74e8e1dcd [2020-10-28 09:02:46,818 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:02:46,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2020-10-28 09:02:46,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/245e7e04f/99ffc53dac374748b839de877a59d143/FLAG74e8e1dcd [2020-10-28 09:02:47,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/245e7e04f/99ffc53dac374748b839de877a59d143 [2020-10-28 09:02:47,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:02:47,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:02:47,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:47,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:02:47,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:02:47,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2171815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47, skipping insertion in model container [2020-10-28 09:02:47,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:02:47,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:02:47,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:47,517 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:02:47,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:47,558 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:02:47,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47 WrapperNode [2020-10-28 09:02:47,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:47,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:02:47,560 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:02:47,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:02:47,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... [2020-10-28 09:02:47,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:02:47,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:02:47,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:02:47,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:02:47,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:47,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:02:47,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:02:47,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:02:47,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:02:47,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:02:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:02:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:02:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:02:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:02:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:02:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:02:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:02:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:02:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:02:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:02:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:02:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:02:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:02:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:02:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:02:48,112 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:02:48,113 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:02:48,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:48 BoogieIcfgContainer [2020-10-28 09:02:48,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:02:48,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:02:48,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:02:48,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:02:48,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:02:47" (1/3) ... [2020-10-28 09:02:48,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664d4753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:48, skipping insertion in model container [2020-10-28 09:02:48,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:47" (2/3) ... [2020-10-28 09:02:48,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664d4753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:48, skipping insertion in model container [2020-10-28 09:02:48,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:48" (3/3) ... [2020-10-28 09:02:48,125 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2020-10-28 09:02:48,138 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:02:48,143 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:02:48,159 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:02:48,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:02:48,194 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:02:48,194 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:02:48,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:02:48,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:02:48,195 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:02:48,195 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:02:48,195 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:02:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-28 09:02:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:02:48,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:48,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:48,224 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -368075238, now seen corresponding path program 1 times [2020-10-28 09:02:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:48,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265184570] [2020-10-28 09:02:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:48,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:02:48,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:48,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-28 09:02:48,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:48,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:48,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:48,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:02:48,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:48,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:02:48,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:48,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:48,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:48,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:02:48,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:48,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:48,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:48,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:48,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:48,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265184570] [2020-10-28 09:02:48,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:48,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:02:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139074531] [2020-10-28 09:02:48,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:02:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:02:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:48,835 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-28 09:02:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:48,981 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-28 09:02:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:02:48,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:02:48,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:48,992 INFO L225 Difference]: With dead ends: 55 [2020-10-28 09:02:48,992 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 09:02:48,996 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 09:02:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 09:02:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 09:02:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 09:02:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-28 09:02:49,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-28 09:02:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:49,041 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-28 09:02:49,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:02:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-28 09:02:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:02:49,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:49,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:49,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:02:49,043 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 230860937, now seen corresponding path program 1 times [2020-10-28 09:02:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:49,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334463404] [2020-10-28 09:02:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:49,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:49,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:02:49,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:02:49,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 09:02:49,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:49,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:02:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:02:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:02:49,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:49,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:49,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:49,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:49,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:02:49,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:49,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:49,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:49,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:49,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334463404] [2020-10-28 09:02:49,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:49,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:02:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800858634] [2020-10-28 09:02:49,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:02:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:02:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:49,392 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-28 09:02:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:49,482 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-28 09:02:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:02:49,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:02:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:49,484 INFO L225 Difference]: With dead ends: 41 [2020-10-28 09:02:49,484 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 09:02:49,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 09:02:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-28 09:02:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:02:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-28 09:02:49,495 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-28 09:02:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:49,495 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-28 09:02:49,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:02:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-28 09:02:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 09:02:49,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:49,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:49,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:02:49,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -139042905, now seen corresponding path program 1 times [2020-10-28 09:02:49,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:49,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672868251] [2020-10-28 09:02:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:49,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:50,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:50,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 09:02:50,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:50,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-28 09:02:50,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:50,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:02:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:02:50,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:02:50,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:50,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:50,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:50,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:50,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:50,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:50,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:50,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:50,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:02:50,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672868251] [2020-10-28 09:02:50,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:50,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:02:50,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907710408] [2020-10-28 09:02:50,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:02:50,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:02:50,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:50,241 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-28 09:02:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:50,337 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-28 09:02:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:02:50,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 09:02:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:50,339 INFO L225 Difference]: With dead ends: 44 [2020-10-28 09:02:50,339 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:02:50,340 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 09:02:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:02:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-28 09:02:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:02:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 09:02:50,348 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-28 09:02:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:50,349 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 09:02:50,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:02:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 09:02:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:02:50,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:50,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:50,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:02:50,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:50,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:50,351 INFO L82 PathProgramCache]: Analyzing trace with hash 941681609, now seen corresponding path program 2 times [2020-10-28 09:02:50,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:50,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190652399] [2020-10-28 09:02:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:50,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:02:51,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:51,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-10-28 09:02:51,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:02:51,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:51,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:02:51,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:51,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:51,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:51,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:02:51,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:51,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:51,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:02:51,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190652399] [2020-10-28 09:02:51,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:51,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:02:51,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248900309] [2020-10-28 09:02:51,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:02:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:02:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:51,350 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-10-28 09:02:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:51,426 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-28 09:02:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:02:51,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 09:02:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:51,428 INFO L225 Difference]: With dead ends: 52 [2020-10-28 09:02:51,428 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 09:02:51,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 09:02:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 09:02:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:02:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-28 09:02:51,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2020-10-28 09:02:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:51,436 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-28 09:02:51,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:02:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-28 09:02:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:02:51,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:51,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:51,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:02:51,438 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash 410211367, now seen corresponding path program 1 times [2020-10-28 09:02:51,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:51,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746078562] [2020-10-28 09:02:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:52,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:02:52,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:52,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-28 09:02:52,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:52,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:02:52,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 09:02:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:02:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:52,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:52,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:52,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:52,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:52,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:52,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:52,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:02:52,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746078562] [2020-10-28 09:02:52,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:52,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:02:52,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405912451] [2020-10-28 09:02:52,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:02:52,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:02:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:52,717 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-28 09:02:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:52,808 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-28 09:02:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:02:52,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-28 09:02:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:52,809 INFO L225 Difference]: With dead ends: 48 [2020-10-28 09:02:52,809 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 09:02:52,810 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 09:02:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 09:02:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-28 09:02:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 09:02:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 09:02:52,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2020-10-28 09:02:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:52,818 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 09:02:52,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:02:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 09:02:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 09:02:52,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:52,819 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:52,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:02:52,820 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:52,820 INFO L82 PathProgramCache]: Analyzing trace with hash -49698999, now seen corresponding path program 2 times [2020-10-28 09:02:52,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:52,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775065375] [2020-10-28 09:02:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:52,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:54,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 09:02:54,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:54,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1926 [2020-10-28 09:02:54,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:54,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:02:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:02:54,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:54,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:54,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:54,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:54,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:54,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:54,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:02:54,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775065375] [2020-10-28 09:02:54,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:54,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:02:54,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233852448] [2020-10-28 09:02:54,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:02:54,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:54,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:02:54,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:54,819 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-10-28 09:02:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:54,897 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-28 09:02:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:02:54,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-28 09:02:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:54,898 INFO L225 Difference]: With dead ends: 60 [2020-10-28 09:02:54,898 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:02:54,899 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 09:02:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:02:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-28 09:02:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:02:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-28 09:02:54,905 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2020-10-28 09:02:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:54,906 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-28 09:02:54,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:02:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-28 09:02:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 09:02:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:54,907 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:54,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:02:54,908 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1738552917, now seen corresponding path program 3 times [2020-10-28 09:02:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:54,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976639035] [2020-10-28 09:02:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:54,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:54,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:55,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:58,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 09:02:58,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:58,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3256 [2020-10-28 09:02:58,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:58,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:02:58,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:02:58,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:02:58,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:58,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:58,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:58,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:58,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:58,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:02:58,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:58,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:58,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:58,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:58,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:58,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:02:58,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976639035] [2020-10-28 09:02:58,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:58,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:02:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031333606] [2020-10-28 09:02:58,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:02:58,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:02:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:58,279 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-28 09:02:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:58,409 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-28 09:02:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:02:58,409 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-28 09:02:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:58,411 INFO L225 Difference]: With dead ends: 53 [2020-10-28 09:02:58,411 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 09:02:58,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 09:02:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-28 09:02:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:02:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-28 09:02:58,425 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 30 [2020-10-28 09:02:58,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:58,425 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-28 09:02:58,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:02:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-28 09:02:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:02:58,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:58,429 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:58,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:02:58,429 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1693904059, now seen corresponding path program 4 times [2020-10-28 09:02:58,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:58,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415094019] [2020-10-28 09:02:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:03:02,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:02,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4384 [2020-10-28 09:03:02,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:03:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:03:02,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:03:02,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:02,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:02,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:02,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:02,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:03:02,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415094019] [2020-10-28 09:03:02,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:02,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:03:02,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371350785] [2020-10-28 09:03:02,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:03:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:02,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:03:02,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:02,929 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-10-28 09:03:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:03,054 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-28 09:03:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:03:03,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:03:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:03,055 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:03:03,055 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 09:03:03,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:03,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 09:03:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-28 09:03:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:03:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-28 09:03:03,062 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 33 [2020-10-28 09:03:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:03,063 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-28 09:03:03,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:03:03,063 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-28 09:03:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:03:03,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:03,064 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:03,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:03:03,064 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1295330155, now seen corresponding path program 5 times [2020-10-28 09:03:03,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:03,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673187766] [2020-10-28 09:03:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:03,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:08,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 09:03:08,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:08,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:08,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:08,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:08,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:03:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:08,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:03:08,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:08,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:08,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:08,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:08,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:03:08,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:08,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:08,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:03:08,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673187766] [2020-10-28 09:03:08,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:08,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:03:08,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622703576] [2020-10-28 09:03:08,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:03:08,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:08,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:03:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:03:08,157 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2020-10-28 09:03:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:08,231 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-28 09:03:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:03:08,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 09:03:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:08,233 INFO L225 Difference]: With dead ends: 74 [2020-10-28 09:03:08,233 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:03:08,233 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 09:03:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:03:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-28 09:03:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 09:03:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-28 09:03:08,245 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 36 [2020-10-28 09:03:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:08,247 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-28 09:03:08,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:03:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-28 09:03:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:03:08,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:08,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:08,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:03:08,249 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:08,250 INFO L82 PathProgramCache]: Analyzing trace with hash 192662477, now seen corresponding path program 6 times [2020-10-28 09:03:08,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:08,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565131224] [2020-10-28 09:03:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:03:13,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:13,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:03:13,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:03:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:03:13,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:03:13,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:13,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:13,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:13,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:13,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:13,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:13,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:13,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:13,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:03:13,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565131224] [2020-10-28 09:03:13,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:13,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:03:13,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537923958] [2020-10-28 09:03:13,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:03:13,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:13,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:03:13,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:13,371 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 9 states. [2020-10-28 09:03:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:13,467 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-28 09:03:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:03:13,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-28 09:03:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:13,469 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:03:13,469 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:03:13,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:13,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:03:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-28 09:03:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:03:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-28 09:03:13,480 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 38 [2020-10-28 09:03:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:13,480 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-28 09:03:13,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:03:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-28 09:03:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:03:13,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:13,483 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:13,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:03:13,483 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash 56968675, now seen corresponding path program 7 times [2020-10-28 09:03:13,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:13,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802278208] [2020-10-28 09:03:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:13,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:13,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:18,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:18,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:03:18,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:18,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:18,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:03:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:03:18,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:03:18,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:18,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:18,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:18,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:18,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:18,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:18,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:18,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:18,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:18,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:18,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:03:18,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802278208] [2020-10-28 09:03:18,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:18,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:03:18,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637809865] [2020-10-28 09:03:18,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:03:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:03:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:18,611 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 10 states. [2020-10-28 09:03:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:18,731 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-28 09:03:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:03:18,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 09:03:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:18,732 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:03:18,733 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:03:18,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:03:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-28 09:03:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 09:03:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 09:03:18,739 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 41 [2020-10-28 09:03:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:18,740 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 09:03:18,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:03:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 09:03:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 09:03:18,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:18,741 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:18,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:03:18,741 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash -832861171, now seen corresponding path program 8 times [2020-10-28 09:03:18,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:18,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046714462] [2020-10-28 09:03:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:18,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:18,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:18,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:23,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:23,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 09:03:23,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:23,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:03:23,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:23,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:03:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:03:23,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:23,975 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-28 09:03:23,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:23,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:23,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:23,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:23,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:23,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:03:23,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:23,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:23,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:23,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:03:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-28 09:03:23,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046714462] [2020-10-28 09:03:23,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:23,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:03:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850114952] [2020-10-28 09:03:23,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:03:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:03:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:03:24,000 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 7 states. [2020-10-28 09:03:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:24,099 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-10-28 09:03:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:03:24,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-28 09:03:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:24,100 INFO L225 Difference]: With dead ends: 88 [2020-10-28 09:03:24,101 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 09:03:24,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:03:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 09:03:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-28 09:03:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 09:03:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-28 09:03:24,109 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 44 [2020-10-28 09:03:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:24,109 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-28 09:03:24,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:03:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-28 09:03:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 09:03:24,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:24,111 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:24,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:03:24,111 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1848945263, now seen corresponding path program 9 times [2020-10-28 09:03:24,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:24,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437236543] [2020-10-28 09:03:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:24,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:24,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:29,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 09:03:29,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:29,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:29,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:29,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:29,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:03:29,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:03:29,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:03:29,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:03:29,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:29,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:29,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:29,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:29,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:03:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437236543] [2020-10-28 09:03:29,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:29,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:03:29,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435776170] [2020-10-28 09:03:29,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:03:29,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:29,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:03:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:29,277 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 11 states. [2020-10-28 09:03:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:29,423 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-28 09:03:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:03:29,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-28 09:03:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:29,425 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:03:29,426 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 09:03:29,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 09:03:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-28 09:03:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:03:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-28 09:03:29,433 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-10-28 09:03:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:29,433 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-28 09:03:29,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:03:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-28 09:03:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:03:29,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:29,434 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:29,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:03:29,435 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:29,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1793149953, now seen corresponding path program 10 times [2020-10-28 09:03:29,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:29,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381799143] [2020-10-28 09:03:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:29,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:29,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:34,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:34,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:03:34,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:34,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:03:34,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:34,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:03:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:34,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:03:34,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:34,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:34,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:34,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:34,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:34,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:34,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:34,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:34,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:34,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:34,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-28 09:03:34,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381799143] [2020-10-28 09:03:34,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:34,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:03:34,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764627303] [2020-10-28 09:03:34,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:03:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:34,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:03:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:34,543 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 8 states. [2020-10-28 09:03:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:34,641 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-10-28 09:03:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:03:34,642 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 09:03:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:34,643 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:03:34,643 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:03:34,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:03:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:03:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 09:03:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:03:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-28 09:03:34,650 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 49 [2020-10-28 09:03:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:34,650 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-28 09:03:34,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:03:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-28 09:03:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:03:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:34,652 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:34,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:03:34,652 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:34,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1555703073, now seen corresponding path program 11 times [2020-10-28 09:03:34,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:34,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721097545] [2020-10-28 09:03:34,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:34,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:35,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:39,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:39,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:03:39,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:39,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:03:39,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:39,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:03:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:03:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:03:39,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:39,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:39,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:39,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:39,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:39,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:39,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:39,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:39,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:39,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:39,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:39,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:03:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721097545] [2020-10-28 09:03:39,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:39,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:03:39,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981743381] [2020-10-28 09:03:39,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:03:39,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:39,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:03:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:39,809 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2020-10-28 09:03:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:39,933 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2020-10-28 09:03:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:03:39,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 09:03:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:39,935 INFO L225 Difference]: With dead ends: 74 [2020-10-28 09:03:39,935 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 09:03:39,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 09:03:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-28 09:03:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 09:03:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-10-28 09:03:39,950 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 51 [2020-10-28 09:03:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:39,950 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-10-28 09:03:39,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:03:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-10-28 09:03:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:03:39,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:39,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:39,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:03:39,955 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash -432732783, now seen corresponding path program 12 times [2020-10-28 09:03:39,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:39,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57420469] [2020-10-28 09:03:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:44,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:44,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:03:44,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:03:44,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:45,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:45,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:45,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:45,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:45,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:45,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:45,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:45,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:45,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:03:45,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57420469] [2020-10-28 09:03:45,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:45,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:03:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223041110] [2020-10-28 09:03:45,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:03:45,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:03:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:45,143 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2020-10-28 09:03:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:45,300 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-28 09:03:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:03:45,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-28 09:03:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:45,304 INFO L225 Difference]: With dead ends: 77 [2020-10-28 09:03:45,304 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:03:45,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:03:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-28 09:03:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 09:03:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-28 09:03:45,319 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 54 [2020-10-28 09:03:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:45,320 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-28 09:03:45,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:03:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-28 09:03:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:03:45,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:45,321 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:45,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:03:45,321 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash 474908063, now seen corresponding path program 13 times [2020-10-28 09:03:45,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:45,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921108070] [2020-10-28 09:03:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:45,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:45,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:50,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:50,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:03:50,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:03:50,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:50,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:50,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:50,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:50,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:50,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:50,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:50,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:50,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:50,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:50,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-28 09:03:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921108070] [2020-10-28 09:03:50,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:50,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:03:50,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050059169] [2020-10-28 09:03:50,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:03:50,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:50,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:03:50,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:50,449 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 9 states. [2020-10-28 09:03:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:50,591 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2020-10-28 09:03:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:03:50,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-28 09:03:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:50,593 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:03:50,593 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 09:03:50,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 09:03:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 09:03:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:03:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-10-28 09:03:50,605 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 57 [2020-10-28 09:03:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:50,605 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-10-28 09:03:50,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:03:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-10-28 09:03:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:03:50,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:50,608 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:50,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:03:50,608 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:50,609 INFO L82 PathProgramCache]: Analyzing trace with hash 966612605, now seen corresponding path program 14 times [2020-10-28 09:03:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:50,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512537420] [2020-10-28 09:03:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:50,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:50,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:52,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:55,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:03:55,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:03:55,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:55,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:55,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:55,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:03:55,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:03:55,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:03:55,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:55,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:55,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:55,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:55,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:55,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:55,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:55,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 09:03:55,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512537420] [2020-10-28 09:03:55,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:55,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:03:55,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080354165] [2020-10-28 09:03:55,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:03:55,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:03:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:55,806 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 14 states. [2020-10-28 09:03:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:55,929 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-10-28 09:03:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:03:55,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-28 09:03:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:55,930 INFO L225 Difference]: With dead ends: 82 [2020-10-28 09:03:55,930 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:03:55,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:03:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-28 09:03:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:03:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-28 09:03:55,936 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-10-28 09:03:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:55,936 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-28 09:03:55,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:03:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-28 09:03:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 09:03:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:55,937 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:03:55,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:03:55,938 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1420786995, now seen corresponding path program 15 times [2020-10-28 09:03:55,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:55,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559077599] [2020-10-28 09:03:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:55,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:57,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:00,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:00,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 09:04:00,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:00,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:04:00,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:00,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:00,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:04:00,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:00,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:04:00,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:01,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:01,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:01,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:01,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:04:01,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:01,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-28 09:04:01,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559077599] [2020-10-28 09:04:01,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:01,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:04:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330481623] [2020-10-28 09:04:01,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:04:01,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:04:01,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:04:01,076 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 10 states. [2020-10-28 09:04:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:01,180 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2020-10-28 09:04:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:04:01,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-28 09:04:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:01,181 INFO L225 Difference]: With dead ends: 118 [2020-10-28 09:04:01,182 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:04:01,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:04:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:04:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-28 09:04:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 09:04:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-28 09:04:01,190 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 62 [2020-10-28 09:04:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:01,190 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-28 09:04:01,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:04:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-28 09:04:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 09:04:01,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:01,191 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:01,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:04:01,192 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:01,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1024030955, now seen corresponding path program 16 times [2020-10-28 09:04:01,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:01,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540391267] [2020-10-28 09:04:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:02,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:06,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 09:04:06,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:06,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 09:04:06,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:06,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:06,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:04:06,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:04:06,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:04:06,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:06,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:06,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:06,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:06,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:06,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:06,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:06,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 09:04:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540391267] [2020-10-28 09:04:06,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:06,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:04:06,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249943498] [2020-10-28 09:04:06,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:04:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:04:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:04:06,406 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 15 states. [2020-10-28 09:04:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:06,580 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-28 09:04:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:04:06,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-28 09:04:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:06,582 INFO L225 Difference]: With dead ends: 87 [2020-10-28 09:04:06,582 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 09:04:06,583 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 09:04:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 09:04:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-28 09:04:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:04:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-10-28 09:04:06,598 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 64 [2020-10-28 09:04:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:06,599 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-10-28 09:04:06,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:04:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-10-28 09:04:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:04:06,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:06,600 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:06,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:04:06,600 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1228053093, now seen corresponding path program 17 times [2020-10-28 09:04:06,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854761422] [2020-10-28 09:04:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:06,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:06,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:08,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:11,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:11,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:04:11,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:11,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:04:11,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:11,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:11,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:04:11,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:04:11,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:04:11,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:11,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:11,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:11,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:11,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:11,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 09:04:11,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854761422] [2020-10-28 09:04:11,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:11,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:04:11,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534359195] [2020-10-28 09:04:11,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:04:11,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:11,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:04:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:04:11,846 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 16 states. [2020-10-28 09:04:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:12,066 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-10-28 09:04:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:04:12,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-28 09:04:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:12,067 INFO L225 Difference]: With dead ends: 90 [2020-10-28 09:04:12,068 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:04:12,068 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 09:04:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:04:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-28 09:04:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:04:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2020-10-28 09:04:12,073 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 67 [2020-10-28 09:04:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:12,073 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2020-10-28 09:04:12,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:04:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2020-10-28 09:04:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 09:04:12,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:12,074 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:12,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:04:12,075 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:12,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:12,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1872842411, now seen corresponding path program 18 times [2020-10-28 09:04:12,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:12,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908886648] [2020-10-28 09:04:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:13,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:17,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:17,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 09:04:17,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:04:17,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:17,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:04:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:17,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:04:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:17,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:17,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:17,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:17,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:17,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-28 09:04:17,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908886648] [2020-10-28 09:04:17,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:17,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:04:17,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815051636] [2020-10-28 09:04:17,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:04:17,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:17,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:04:17,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:04:17,214 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand 11 states. [2020-10-28 09:04:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:17,313 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2020-10-28 09:04:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:04:17,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 09:04:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:17,317 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:04:17,317 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:04:17,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:04:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:04:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-28 09:04:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:04:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-10-28 09:04:17,324 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 70 [2020-10-28 09:04:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:17,324 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-10-28 09:04:17,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:04:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-10-28 09:04:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 09:04:17,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:17,325 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:17,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:04:17,325 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash 334936375, now seen corresponding path program 19 times [2020-10-28 09:04:17,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:17,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653842279] [2020-10-28 09:04:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:17,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:19,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:22,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 09:04:22,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:22,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:04:22,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:22,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:22,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:04:22,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:04:22,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:04:22,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:22,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:22,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:22,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 09:04:22,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653842279] [2020-10-28 09:04:22,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:22,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:04:22,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22855937] [2020-10-28 09:04:22,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:04:22,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:04:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:04:22,593 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 17 states. [2020-10-28 09:04:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:22,802 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-28 09:04:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:04:22,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-28 09:04:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:22,803 INFO L225 Difference]: With dead ends: 95 [2020-10-28 09:04:22,803 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 09:04:22,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:04:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 09:04:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-28 09:04:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:04:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-10-28 09:04:22,809 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 72 [2020-10-28 09:04:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:22,810 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-10-28 09:04:22,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:04:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-10-28 09:04:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:04:22,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:22,811 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:22,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:04:22,811 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -594057159, now seen corresponding path program 20 times [2020-10-28 09:04:22,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:22,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025273939] [2020-10-28 09:04:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:22,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:25,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:27,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:04:27,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:04:27,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:27,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:04:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:04:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:04:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:28,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:28,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 09:04:28,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025273939] [2020-10-28 09:04:28,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:28,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:04:28,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289936702] [2020-10-28 09:04:28,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:04:28,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:28,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:04:28,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:04:28,086 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 18 states. [2020-10-28 09:04:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:28,331 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-10-28 09:04:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:04:28,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-28 09:04:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:28,332 INFO L225 Difference]: With dead ends: 98 [2020-10-28 09:04:28,332 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:04:28,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:04:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:04:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-28 09:04:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:04:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-28 09:04:28,340 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 75 [2020-10-28 09:04:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:28,341 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-28 09:04:28,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:04:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-28 09:04:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 09:04:28,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:28,343 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:28,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:04:28,345 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 528826871, now seen corresponding path program 21 times [2020-10-28 09:04:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:28,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863678586] [2020-10-28 09:04:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:28,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:33,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 09:04:33,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:33,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:04:33,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:33,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:33,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:04:33,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:33,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:04:33,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:33,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:33,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:33,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:33,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:33,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:33,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:33,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 09:04:33,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863678586] [2020-10-28 09:04:33,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:33,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:04:33,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869989486] [2020-10-28 09:04:33,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:04:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:04:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:04:33,514 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 12 states. [2020-10-28 09:04:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:33,612 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2020-10-28 09:04:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:04:33,612 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-28 09:04:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:33,613 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:04:33,613 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 09:04:33,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:04:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 09:04:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-28 09:04:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 09:04:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2020-10-28 09:04:33,623 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 78 [2020-10-28 09:04:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:33,623 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2020-10-28 09:04:33,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:04:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2020-10-28 09:04:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 09:04:33,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:33,626 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:33,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:04:33,627 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1318078425, now seen corresponding path program 22 times [2020-10-28 09:04:33,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:33,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676750903] [2020-10-28 09:04:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:33,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:36,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:38,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:04:38,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:38,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:38,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:38,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:38,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:38,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:38,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:38,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:38,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 09:04:38,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676750903] [2020-10-28 09:04:38,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:38,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:04:38,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304995381] [2020-10-28 09:04:38,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:04:38,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:38,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:04:38,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:38,940 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 19 states. [2020-10-28 09:04:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:39,216 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-28 09:04:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:04:39,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-10-28 09:04:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:39,218 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:04:39,218 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:04:39,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:39,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:04:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-28 09:04:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:04:39,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-10-28 09:04:39,224 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 80 [2020-10-28 09:04:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:39,225 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-10-28 09:04:39,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:04:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-10-28 09:04:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:04:39,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:39,226 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:39,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:04:39,226 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash 808762967, now seen corresponding path program 23 times [2020-10-28 09:04:39,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:39,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900598866] [2020-10-28 09:04:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:39,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:42,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:44,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:04:44,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:44,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:44,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:44,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:44,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:44,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:44,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:44,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:44,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:44,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:44,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:44,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-28 09:04:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900598866] [2020-10-28 09:04:44,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:44,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:04:44,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513749669] [2020-10-28 09:04:44,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:04:44,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:44,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:04:44,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:04:44,394 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 13 states. [2020-10-28 09:04:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:44,530 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2020-10-28 09:04:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:04:44,530 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83 [2020-10-28 09:04:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:44,532 INFO L225 Difference]: With dead ends: 154 [2020-10-28 09:04:44,532 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 09:04:44,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:04:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 09:04:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 09:04:44,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:04:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-10-28 09:04:44,538 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 83 [2020-10-28 09:04:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:44,539 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-10-28 09:04:44,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:04:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-10-28 09:04:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:04:44,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:44,540 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:44,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:04:44,540 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1175710283, now seen corresponding path program 24 times [2020-10-28 09:04:44,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:44,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849889139] [2020-10-28 09:04:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:44,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:44,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:49,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:49,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:04:49,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:49,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:49,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:49,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:49,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 09:04:49,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849889139] [2020-10-28 09:04:49,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:49,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:04:49,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961388332] [2020-10-28 09:04:49,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:04:49,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:49,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:04:49,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:49,830 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 20 states. [2020-10-28 09:04:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:49,980 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-10-28 09:04:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:04:49,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-10-28 09:04:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:49,981 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:04:49,982 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:04:49,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:04:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-28 09:04:49,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 09:04:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-10-28 09:04:49,988 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 85 [2020-10-28 09:04:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:49,988 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-10-28 09:04:49,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:04:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-10-28 09:04:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 09:04:49,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:49,989 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:49,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:04:49,990 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1601318149, now seen corresponding path program 25 times [2020-10-28 09:04:49,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:49,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521493108] [2020-10-28 09:04:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:50,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:50,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:55,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:55,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 09:04:55,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:04:55,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:04:55,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:55,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:04:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:04:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:04:55,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:55,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:55,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:55,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:55,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:55,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:04:55,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:55,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:55,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 09:04:55,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521493108] [2020-10-28 09:04:55,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:55,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:04:55,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179003908] [2020-10-28 09:04:55,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:04:55,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:04:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:55,350 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 21 states. [2020-10-28 09:04:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:55,601 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2020-10-28 09:04:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:04:55,602 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 88 [2020-10-28 09:04:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:55,603 INFO L225 Difference]: With dead ends: 111 [2020-10-28 09:04:55,603 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 09:04:55,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 09:04:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-28 09:04:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:04:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2020-10-28 09:04:55,614 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 88 [2020-10-28 09:04:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:55,615 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2020-10-28 09:04:55,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:04:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2020-10-28 09:04:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:04:55,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:55,617 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:04:55,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:04:55,617 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2141796363, now seen corresponding path program 26 times [2020-10-28 09:04:55,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:55,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734838249] [2020-10-28 09:04:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:00,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:05:00,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:00,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:00,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:00,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:00,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:00,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:00,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:00,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:00,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:00,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:00,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:00,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-28 09:05:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734838249] [2020-10-28 09:05:00,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:00,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:05:00,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024243105] [2020-10-28 09:05:00,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:05:00,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:05:00,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:05:00,811 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 14 states. [2020-10-28 09:05:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:00,951 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2020-10-28 09:05:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:05:00,952 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 91 [2020-10-28 09:05:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:00,953 INFO L225 Difference]: With dead ends: 168 [2020-10-28 09:05:00,953 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:05:00,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:05:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:05:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 09:05:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 09:05:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-10-28 09:05:00,960 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 91 [2020-10-28 09:05:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:00,960 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-10-28 09:05:00,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:05:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-10-28 09:05:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 09:05:00,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:00,961 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:00,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:05:00,962 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:00,962 INFO L82 PathProgramCache]: Analyzing trace with hash 367518035, now seen corresponding path program 27 times [2020-10-28 09:05:00,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:00,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924213448] [2020-10-28 09:05:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:00,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:06,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 09:05:06,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 09:05:06,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:06,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:05:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:05:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:05:06,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:06,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:06,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:06,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:06,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:06,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:06,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:06,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:06,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 09:05:06,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924213448] [2020-10-28 09:05:06,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:06,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:05:06,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90094805] [2020-10-28 09:05:06,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:05:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:05:06,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:05:06,377 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 22 states. [2020-10-28 09:05:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:06,640 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-10-28 09:05:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:05:06,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-10-28 09:05:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:06,642 INFO L225 Difference]: With dead ends: 116 [2020-10-28 09:05:06,642 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 09:05:06,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:05:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 09:05:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-28 09:05:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 09:05:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-10-28 09:05:06,648 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 93 [2020-10-28 09:05:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:06,649 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-10-28 09:05:06,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:05:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-10-28 09:05:06,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 09:05:06,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:06,650 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:06,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:05:06,651 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash -616432995, now seen corresponding path program 28 times [2020-10-28 09:05:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:06,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193334044] [2020-10-28 09:05:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:06,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:11,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:05:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:11,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:05:11,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:11,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:11,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:11,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:11,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:11,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:11,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:11,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:11,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:11,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:11,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-28 09:05:11,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193334044] [2020-10-28 09:05:11,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:11,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:05:11,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414119877] [2020-10-28 09:05:11,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:05:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:05:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:05:11,864 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 15 states. [2020-10-28 09:05:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:12,036 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2020-10-28 09:05:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:05:12,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-10-28 09:05:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:12,039 INFO L225 Difference]: With dead ends: 176 [2020-10-28 09:05:12,039 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:05:12,040 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 09:05:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:05:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-28 09:05:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 09:05:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-10-28 09:05:12,047 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 96 [2020-10-28 09:05:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:12,047 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-10-28 09:05:12,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:05:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-10-28 09:05:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 09:05:12,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:12,048 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:12,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:05:12,049 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1642073087, now seen corresponding path program 29 times [2020-10-28 09:05:12,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:12,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611086849] [2020-10-28 09:05:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:12,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:17,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:17,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 09:05:17,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:17,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:05:17,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:17,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:05:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:05:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 09:05:17,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:17,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:17,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:17,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:17,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:17,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:17,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:17,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:17,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:17,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:17,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 09:05:17,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611086849] [2020-10-28 09:05:17,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:17,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:05:17,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500846857] [2020-10-28 09:05:17,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:05:17,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:05:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:05:17,482 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 23 states. [2020-10-28 09:05:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:17,768 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2020-10-28 09:05:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:05:17,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-10-28 09:05:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:17,770 INFO L225 Difference]: With dead ends: 121 [2020-10-28 09:05:17,770 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:05:17,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:05:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:05:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-28 09:05:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 09:05:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2020-10-28 09:05:17,779 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 98 [2020-10-28 09:05:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:17,780 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2020-10-28 09:05:17,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:05:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2020-10-28 09:05:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:05:17,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:17,781 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:17,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:05:17,781 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2142224497, now seen corresponding path program 30 times [2020-10-28 09:05:17,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:17,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535588985] [2020-10-28 09:05:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:17,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:17,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:22,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:22,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 09:05:22,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:05:22,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:22,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:05:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:05:22,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:05:22,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:23,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:23,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:23,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:23,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:23,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:23,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:23,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:23,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:23,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:23,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:23,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 09:05:23,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535588985] [2020-10-28 09:05:23,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:23,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:05:23,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186021160] [2020-10-28 09:05:23,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:05:23,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:05:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:05:23,234 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand 24 states. [2020-10-28 09:05:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:23,482 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2020-10-28 09:05:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:05:23,482 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 101 [2020-10-28 09:05:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:23,484 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:05:23,484 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 09:05:23,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:05:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 09:05:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-28 09:05:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 09:05:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-10-28 09:05:23,493 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 101 [2020-10-28 09:05:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:23,494 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-28 09:05:23,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:05:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2020-10-28 09:05:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 09:05:23,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:23,495 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:23,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:05:23,496 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1383637313, now seen corresponding path program 31 times [2020-10-28 09:05:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:23,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534187468] [2020-10-28 09:05:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:28,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:28,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 09:05:28,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 09:05:28,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:28,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:05:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:05:28,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:28,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:28,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:28,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:28,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-28 09:05:28,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534187468] [2020-10-28 09:05:28,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:28,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:05:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614849152] [2020-10-28 09:05:28,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:05:28,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:28,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:05:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:05:28,755 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 16 states. [2020-10-28 09:05:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:28,869 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-10-28 09:05:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:05:28,870 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-10-28 09:05:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:28,871 INFO L225 Difference]: With dead ends: 190 [2020-10-28 09:05:28,871 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 09:05:28,872 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 09:05:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 09:05:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-28 09:05:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 09:05:28,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2020-10-28 09:05:28,877 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 104 [2020-10-28 09:05:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:28,878 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2020-10-28 09:05:28,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:05:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2020-10-28 09:05:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 09:05:28,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:28,879 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:28,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:05:28,879 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:28,880 INFO L82 PathProgramCache]: Analyzing trace with hash 62320161, now seen corresponding path program 32 times [2020-10-28 09:05:28,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:28,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456244763] [2020-10-28 09:05:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:28,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:33,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:33,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 09:05:33,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:33,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:05:33,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:33,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:05:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:05:33,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 09:05:33,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:34,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:34,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:34,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:34,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:34,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:34,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:34,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:34,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:34,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 09:05:34,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456244763] [2020-10-28 09:05:34,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:34,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:05:34,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337514066] [2020-10-28 09:05:34,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:05:34,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:05:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:05:34,391 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 25 states. [2020-10-28 09:05:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:34,584 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2020-10-28 09:05:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:05:34,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 106 [2020-10-28 09:05:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:34,587 INFO L225 Difference]: With dead ends: 129 [2020-10-28 09:05:34,587 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:05:34,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:05:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:05:34,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-28 09:05:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:05:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-10-28 09:05:34,593 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 106 [2020-10-28 09:05:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:34,593 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-10-28 09:05:34,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:05:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2020-10-28 09:05:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:05:34,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:34,594 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:34,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:05:34,595 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash -320531697, now seen corresponding path program 33 times [2020-10-28 09:05:34,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:34,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759022433] [2020-10-28 09:05:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:34,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:34,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:39,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:39,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:05:39,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:05:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:40,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:40,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:40,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:40,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:40,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:40,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:40,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:40,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 09:05:40,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759022433] [2020-10-28 09:05:40,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:40,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:05:40,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743703418] [2020-10-28 09:05:40,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:05:40,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:05:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:05:40,133 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand 26 states. [2020-10-28 09:05:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:40,433 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2020-10-28 09:05:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:05:40,434 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 109 [2020-10-28 09:05:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:40,436 INFO L225 Difference]: With dead ends: 132 [2020-10-28 09:05:40,436 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 09:05:40,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:05:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 09:05:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-28 09:05:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 09:05:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2020-10-28 09:05:40,442 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 109 [2020-10-28 09:05:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:40,443 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2020-10-28 09:05:40,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:05:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2020-10-28 09:05:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 09:05:40,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:40,443 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:40,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:05:40,444 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:40,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1572904801, now seen corresponding path program 34 times [2020-10-28 09:05:40,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:40,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974255143] [2020-10-28 09:05:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:40,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:40,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:05:45,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:45,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:05:45,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:45,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:45,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:45,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:45,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:45,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-28 09:05:45,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974255143] [2020-10-28 09:05:45,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:45,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:05:45,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674455070] [2020-10-28 09:05:45,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:05:45,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:05:45,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:05:45,723 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand 17 states. [2020-10-28 09:05:45,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:45,829 INFO L93 Difference]: Finished difference Result 204 states and 254 transitions. [2020-10-28 09:05:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:05:45,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-28 09:05:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:45,830 INFO L225 Difference]: With dead ends: 204 [2020-10-28 09:05:45,831 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:05:45,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:05:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:05:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-28 09:05:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 09:05:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2020-10-28 09:05:45,835 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 112 [2020-10-28 09:05:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:45,836 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2020-10-28 09:05:45,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:05:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2020-10-28 09:05:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 09:05:45,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:45,837 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:45,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:05:45,837 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:45,838 INFO L82 PathProgramCache]: Analyzing trace with hash 287550659, now seen corresponding path program 35 times [2020-10-28 09:05:45,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:45,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38784517] [2020-10-28 09:05:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:45,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:50,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:50,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 09:05:50,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:50,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:05:50,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:50,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:50,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:05:50,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:05:50,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 09:05:50,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:51,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:51,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:51,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:51,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:51,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:51,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:51,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:51,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:51,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 09:05:51,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38784517] [2020-10-28 09:05:51,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:51,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:05:51,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033767097] [2020-10-28 09:05:51,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:05:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:51,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:05:51,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:05:51,376 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand 27 states. [2020-10-28 09:05:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:51,716 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2020-10-28 09:05:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:05:51,716 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 114 [2020-10-28 09:05:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:51,717 INFO L225 Difference]: With dead ends: 137 [2020-10-28 09:05:51,718 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 09:05:51,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:05:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 09:05:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-28 09:05:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 09:05:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 148 transitions. [2020-10-28 09:05:51,724 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 148 transitions. Word has length 114 [2020-10-28 09:05:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:51,724 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 148 transitions. [2020-10-28 09:05:51,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:05:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 148 transitions. [2020-10-28 09:05:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 09:05:51,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:51,725 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:51,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:05:51,725 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash 782317869, now seen corresponding path program 36 times [2020-10-28 09:05:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:51,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700227307] [2020-10-28 09:05:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:51,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:51,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:56,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:05:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:05:56,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:56,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:56,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:56,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:56,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:56,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:56,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:56,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:56,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:56,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-28 09:05:57,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700227307] [2020-10-28 09:05:57,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:57,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:05:57,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847261342] [2020-10-28 09:05:57,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:05:57,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:05:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:05:57,004 INFO L87 Difference]: Start difference. First operand 122 states and 148 transitions. Second operand 18 states. [2020-10-28 09:05:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:57,194 INFO L93 Difference]: Finished difference Result 212 states and 264 transitions. [2020-10-28 09:05:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:05:57,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2020-10-28 09:05:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:57,196 INFO L225 Difference]: With dead ends: 212 [2020-10-28 09:05:57,196 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 09:05:57,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:05:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 09:05:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 09:05:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 09:05:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2020-10-28 09:05:57,203 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 117 [2020-10-28 09:05:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:57,203 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2020-10-28 09:05:57,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:05:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2020-10-28 09:05:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 09:05:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:57,204 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:05:57,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 09:05:57,204 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:57,205 INFO L82 PathProgramCache]: Analyzing trace with hash -145147637, now seen corresponding path program 37 times [2020-10-28 09:05:57,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:57,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810783980] [2020-10-28 09:05:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:57,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:57,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:02,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:02,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 09:06:02,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:06:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:02,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:02,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:02,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:02,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:02,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:02,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:02,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:02,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:02,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1077 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 09:06:02,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810783980] [2020-10-28 09:06:02,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:02,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:06:02,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473074216] [2020-10-28 09:06:02,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:06:02,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:06:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:06:02,813 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand 28 states. [2020-10-28 09:06:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:03,137 INFO L93 Difference]: Finished difference Result 142 states and 171 transitions. [2020-10-28 09:06:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:06:03,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 119 [2020-10-28 09:06:03,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:03,139 INFO L225 Difference]: With dead ends: 142 [2020-10-28 09:06:03,139 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 09:06:03,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:06:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 09:06:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-28 09:06:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 09:06:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2020-10-28 09:06:03,146 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 119 [2020-10-28 09:06:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:03,146 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2020-10-28 09:06:03,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:06:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2020-10-28 09:06:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 09:06:03,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:03,147 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:03,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 09:06:03,147 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash -535762971, now seen corresponding path program 38 times [2020-10-28 09:06:03,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:03,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642422907] [2020-10-28 09:06:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:06,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:08,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 09:06:08,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 09:06:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:08,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:08,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:08,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:08,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:08,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:08,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:08,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:08,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:08,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:08,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:08,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:08,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 09:06:08,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642422907] [2020-10-28 09:06:08,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:08,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:06:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93605053] [2020-10-28 09:06:08,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:06:08,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:08,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:06:08,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:06:08,885 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand 29 states. [2020-10-28 09:06:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:09,121 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2020-10-28 09:06:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:06:09,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 122 [2020-10-28 09:06:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:09,123 INFO L225 Difference]: With dead ends: 145 [2020-10-28 09:06:09,123 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:06:09,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:06:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:06:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-28 09:06:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 09:06:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2020-10-28 09:06:09,130 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 122 [2020-10-28 09:06:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:09,130 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2020-10-28 09:06:09,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:06:09,131 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2020-10-28 09:06:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:06:09,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:09,132 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:09,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 09:06:09,132 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2004193995, now seen corresponding path program 39 times [2020-10-28 09:06:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:09,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612694400] [2020-10-28 09:06:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:14,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:14,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:06:14,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:14,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:14,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:14,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:14,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:06:14,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:14,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:14,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-28 09:06:14,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612694400] [2020-10-28 09:06:14,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:14,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:06:14,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477011] [2020-10-28 09:06:14,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:06:14,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:14,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:06:14,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:06:14,524 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand 19 states. [2020-10-28 09:06:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:14,746 INFO L93 Difference]: Finished difference Result 226 states and 282 transitions. [2020-10-28 09:06:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:06:14,746 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 125 [2020-10-28 09:06:14,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:14,748 INFO L225 Difference]: With dead ends: 226 [2020-10-28 09:06:14,748 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 09:06:14,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:06:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 09:06:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-10-28 09:06:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:06:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2020-10-28 09:06:14,754 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 125 [2020-10-28 09:06:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:14,755 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2020-10-28 09:06:14,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:06:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2020-10-28 09:06:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 09:06:14,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:14,756 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:14,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 09:06:14,756 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1461114025, now seen corresponding path program 40 times [2020-10-28 09:06:14,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:14,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113715591] [2020-10-28 09:06:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:14,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:17,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:19,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:06:19,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:06:19,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 09:06:19,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:20,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:20,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:20,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:20,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:20,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:20,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 09:06:20,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113715591] [2020-10-28 09:06:20,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:20,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:06:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233775211] [2020-10-28 09:06:20,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:06:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:06:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:06:20,398 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand 30 states. [2020-10-28 09:06:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:20,758 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2020-10-28 09:06:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:06:20,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 127 [2020-10-28 09:06:20,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:20,760 INFO L225 Difference]: With dead ends: 150 [2020-10-28 09:06:20,760 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 09:06:20,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:06:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 09:06:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-10-28 09:06:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 09:06:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2020-10-28 09:06:20,766 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 127 [2020-10-28 09:06:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:20,767 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2020-10-28 09:06:20,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:06:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2020-10-28 09:06:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 09:06:20,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:20,768 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:20,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 09:06:20,768 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:20,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1374764935, now seen corresponding path program 41 times [2020-10-28 09:06:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:20,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500792224] [2020-10-28 09:06:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:21,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:24,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:06:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:25,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:06:25,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:26,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:26,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:26,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:26,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:26,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:26,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:26,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:26,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:26,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:26,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:26,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:26,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-28 09:06:26,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500792224] [2020-10-28 09:06:26,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:26,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:06:26,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48768626] [2020-10-28 09:06:26,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:06:26,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:26,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:06:26,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:06:26,173 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand 20 states. [2020-10-28 09:06:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:26,361 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2020-10-28 09:06:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:06:26,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 130 [2020-10-28 09:06:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:26,363 INFO L225 Difference]: With dead ends: 234 [2020-10-28 09:06:26,363 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:06:26,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:06:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:06:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-28 09:06:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 09:06:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 166 transitions. [2020-10-28 09:06:26,370 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 166 transitions. Word has length 130 [2020-10-28 09:06:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:26,370 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 166 transitions. [2020-10-28 09:06:26,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:06:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 166 transitions. [2020-10-28 09:06:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 09:06:26,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:26,371 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:26,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 09:06:26,372 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1959032937, now seen corresponding path program 42 times [2020-10-28 09:06:26,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:26,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142763552] [2020-10-28 09:06:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:26,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:27,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:28,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 09:06:31,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:32,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:32,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:32,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 09:06:32,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142763552] [2020-10-28 09:06:32,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:32,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:06:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425108548] [2020-10-28 09:06:32,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:06:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:06:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:06:32,110 INFO L87 Difference]: Start difference. First operand 137 states and 166 transitions. Second operand 31 states. [2020-10-28 09:06:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:32,422 INFO L93 Difference]: Finished difference Result 155 states and 187 transitions. [2020-10-28 09:06:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:06:32,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 132 [2020-10-28 09:06:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:32,424 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:06:32,424 INFO L226 Difference]: Without dead ends: 142 [2020-10-28 09:06:32,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:06:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-28 09:06:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-10-28 09:06:32,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 09:06:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2020-10-28 09:06:32,431 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 132 [2020-10-28 09:06:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:32,431 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2020-10-28 09:06:32,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:06:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2020-10-28 09:06:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 09:06:32,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:32,432 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:32,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 09:06:32,433 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:32,434 INFO L82 PathProgramCache]: Analyzing trace with hash 60031943, now seen corresponding path program 43 times [2020-10-28 09:06:32,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:32,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664192577] [2020-10-28 09:06:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:06:37,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 09:06:37,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:38,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:38,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:38,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:38,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:38,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 09:06:38,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664192577] [2020-10-28 09:06:38,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:38,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:06:38,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241308230] [2020-10-28 09:06:38,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:06:38,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:38,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:06:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:06:38,208 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand 32 states. [2020-10-28 09:06:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:38,633 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2020-10-28 09:06:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:06:38,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2020-10-28 09:06:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:38,636 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:06:38,636 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 09:06:38,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:06:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 09:06:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-10-28 09:06:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-28 09:06:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 174 transitions. [2020-10-28 09:06:38,643 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 174 transitions. Word has length 135 [2020-10-28 09:06:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:38,643 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 174 transitions. [2020-10-28 09:06:38,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:06:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 174 transitions. [2020-10-28 09:06:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-28 09:06:38,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:38,644 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 09:06:38,645 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 230642601, now seen corresponding path program 44 times [2020-10-28 09:06:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:38,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124506765] [2020-10-28 09:06:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:06:43,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:43,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:06:43,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:44,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:44,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:44,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:44,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:44,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:44,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:44,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:44,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0