/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:52:24,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:52:24,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:52:24,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:52:24,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:52:24,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:52:24,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:52:24,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:52:24,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:52:24,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:52:24,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:52:24,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:52:24,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:52:24,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:52:24,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:52:24,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:52:24,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:52:24,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:52:24,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:52:24,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:52:24,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:52:24,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:52:24,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:52:24,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:52:24,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:52:24,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:52:24,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:52:24,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:52:24,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:52:24,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:52:24,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:52:24,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:52:24,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:52:24,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:52:24,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:52:24,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:52:24,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:52:24,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:52:24,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:52:24,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:52:24,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:52:24,629 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 [2020-10-29 09:52:24,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:52:24,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:52:24,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:52:24,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:52:24,689 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:52:24,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:52:24,689 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:52:24,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:52:24,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:52:24,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:52:24,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:52:24,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:52:24,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:52:24,692 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:52:24,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:52:24,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:52:24,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:52:24,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:52:24,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:52:24,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:52:24,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:52:24,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:52:24,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:52:24,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:52:24,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:52:24,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:52:24,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:52:24,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:52:24,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:52:24,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:52:25,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:52:25,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:52:25,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:52:25,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:52:25,144 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:52:25,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-29 09:52:25,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fd8bab0c/f36c34d72d6b436096f84452717b2b7d/FLAG6c4410efa [2020-10-29 09:52:25,900 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:52:25,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-29 09:52:25,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fd8bab0c/f36c34d72d6b436096f84452717b2b7d/FLAG6c4410efa [2020-10-29 09:52:26,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fd8bab0c/f36c34d72d6b436096f84452717b2b7d [2020-10-29 09:52:26,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:52:26,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:52:26,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:52:26,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:52:26,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:52:26,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11694c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26, skipping insertion in model container [2020-10-29 09:52:26,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:52:26,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:52:26,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:52:26,528 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:52:26,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:52:26,580 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:52:26,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26 WrapperNode [2020-10-29 09:52:26,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:52:26,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:52:26,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:52:26,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:52:26,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (1/1) ... [2020-10-29 09:52:26,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:52:26,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:52:26,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:52:26,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:52:26,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (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 [2020-10-29 09:52:26,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:52:26,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:52:26,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:52:26,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:52:26,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:52:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:52:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:52:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:52:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:52:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:52:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:52:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:52:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:52:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:52:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:52:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:52:26,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:52:27,256 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:52:27,257 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:52:27,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:52:27 BoogieIcfgContainer [2020-10-29 09:52:27,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:52:27,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:52:27,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:52:27,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:52:27,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:52:26" (1/3) ... [2020-10-29 09:52:27,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37093536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:52:27, skipping insertion in model container [2020-10-29 09:52:27,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:26" (2/3) ... [2020-10-29 09:52:27,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37093536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:52:27, skipping insertion in model container [2020-10-29 09:52:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:52:27" (3/3) ... [2020-10-29 09:52:27,272 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2020-10-29 09:52:27,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:52:27,290 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:52:27,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:52:27,354 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:52:27,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:52:27,355 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:52:27,355 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:52:27,355 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:52:27,355 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:52:27,355 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:52:27,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:52:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 09:52:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:52:27,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:27,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:27,381 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:27,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1007641703, now seen corresponding path program 1 times [2020-10-29 09:52:27,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:27,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299741704] [2020-10-29 09:52:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:27,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:27,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:27,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:27,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:27,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:52:27,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:27,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 451 [2020-10-29 09:52:27,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:52:28,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:28,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:52:28,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:52:28,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:28,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:28,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299741704] [2020-10-29 09:52:28,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:52:28,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:52:28,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450916036] [2020-10-29 09:52:28,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:52:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:52:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:52:28,258 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-29 09:52:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:28,594 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-10-29 09:52:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:52:28,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-29 09:52:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:28,606 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:52:28,607 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:52:28,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:52:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:52:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-29 09:52:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:52:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-10-29 09:52:28,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2020-10-29 09:52:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:28,656 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-10-29 09:52:28,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:52:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-10-29 09:52:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:52:28,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:28,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:28,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:52:28,658 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:28,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2025547079, now seen corresponding path program 1 times [2020-10-29 09:52:28,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:28,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930967876] [2020-10-29 09:52:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:28,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:52:28,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:28,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-29 09:52:28,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:52:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:28,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:52:28,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:28,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:28,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:28,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:28,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:28,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:28,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:52:28,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:28,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:28,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:28,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:28,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930967876] [2020-10-29 09:52:28,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:28,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:52:28,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625228831] [2020-10-29 09:52:28,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:52:28,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:28,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:52:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:52:28,952 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-10-29 09:52:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:29,076 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-10-29 09:52:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:52:29,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-29 09:52:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:29,078 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:52:29,078 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:52:29,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:52:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-29 09:52:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:52:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-29 09:52:29,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-29 09:52:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:29,087 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-29 09:52:29,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:52:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-29 09:52:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:52:29,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:29,088 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:29,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:52:29,089 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:29,090 INFO L82 PathProgramCache]: Analyzing trace with hash -530890467, now seen corresponding path program 2 times [2020-10-29 09:52:29,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:29,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889971372] [2020-10-29 09:52:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:29,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:52:29,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:29,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-29 09:52:29,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:29,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:29,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:52:29,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:29,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:52:29,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:52:29,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:29,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:29,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:29,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:52:29,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:29,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:29,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:29,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:29,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889971372] [2020-10-29 09:52:29,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:29,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:52:29,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451140934] [2020-10-29 09:52:29,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:52:29,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:29,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:52:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:52:29,344 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-10-29 09:52:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:29,581 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-29 09:52:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:52:29,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 09:52:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:29,582 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:52:29,583 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:52:29,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:52:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:52:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:52:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:52:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-29 09:52:29,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-29 09:52:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:29,596 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-29 09:52:29,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:52:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-29 09:52:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:52:29,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:29,599 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:29,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:52:29,600 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1823924231, now seen corresponding path program 3 times [2020-10-29 09:52:29,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:29,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848256815] [2020-10-29 09:52:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:29,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:52:29,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:29,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 09:52:29,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:29,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:52:29,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:29,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:52:29,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 09:52:29,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:29,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:29,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:29,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:29,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:52:29,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:29,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:29,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:52:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:29,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848256815] [2020-10-29 09:52:29,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:29,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:52:29,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762623801] [2020-10-29 09:52:29,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:52:29,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:52:29,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:29,944 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-10-29 09:52:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:30,142 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-29 09:52:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:52:30,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-29 09:52:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:30,144 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:52:30,144 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:52:30,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:52:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:52:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:52:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:52:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-29 09:52:30,151 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-29 09:52:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:30,151 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-29 09:52:30,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:52:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-29 09:52:30,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:52:30,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:30,152 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:30,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:52:30,153 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1808735837, now seen corresponding path program 4 times [2020-10-29 09:52:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:30,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554708991] [2020-10-29 09:52:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:30,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:30,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:52:30,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:30,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-29 09:52:30,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:30,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:52:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:52:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:30,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:30,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:30,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:30,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:52:30,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:30,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:30,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554708991] [2020-10-29 09:52:30,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:30,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:52:30,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221560667] [2020-10-29 09:52:30,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:52:30,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:52:30,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:52:30,437 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-10-29 09:52:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:30,683 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-29 09:52:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:52:30,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-29 09:52:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:30,684 INFO L225 Difference]: With dead ends: 26 [2020-10-29 09:52:30,684 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:52:30,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:52:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:52:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:52:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:52:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-29 09:52:30,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-29 09:52:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:30,691 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-29 09:52:30,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:52:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-29 09:52:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:52:30,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:30,692 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:30,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:52:30,693 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1337895623, now seen corresponding path program 5 times [2020-10-29 09:52:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:30,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561616023] [2020-10-29 09:52:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:30,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:52:30,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:30,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-29 09:52:30,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:30,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:30,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:52:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:52:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:30,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:30,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:30,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:30,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:30,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:52:30,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:30,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:30,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:30,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:30,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561616023] [2020-10-29 09:52:30,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:30,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:52:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262747310] [2020-10-29 09:52:30,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:52:30,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:52:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:52:30,955 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-10-29 09:52:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:31,237 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-29 09:52:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:52:31,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-29 09:52:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:31,238 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:52:31,238 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:52:31,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:52:31,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:52:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:52:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:52:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-29 09:52:31,244 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-29 09:52:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:31,244 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-29 09:52:31,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:52:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-29 09:52:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:52:31,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:31,245 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:31,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:52:31,246 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:31,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:31,246 INFO L82 PathProgramCache]: Analyzing trace with hash -373249123, now seen corresponding path program 6 times [2020-10-29 09:52:31,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:31,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22592182] [2020-10-29 09:52:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:31,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:31,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:31,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:52:31,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:31,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-29 09:52:31,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:31,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:52:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:31,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:52:31,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:31,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:31,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:31,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:31,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:31,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:31,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:52:31,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:31,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:31,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:31,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:31,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22592182] [2020-10-29 09:52:31,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:31,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:52:31,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772100354] [2020-10-29 09:52:31,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:52:31,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:31,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:52:31,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:52:31,553 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-10-29 09:52:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:31,865 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-29 09:52:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:52:31,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-29 09:52:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:31,867 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:52:31,867 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 09:52:31,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:52:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 09:52:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-29 09:52:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:52:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-29 09:52:31,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-29 09:52:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:31,873 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-29 09:52:31,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:52:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-29 09:52:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:52:31,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:31,874 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:31,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:52:31,875 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1879128697, now seen corresponding path program 7 times [2020-10-29 09:52:31,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:31,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834563973] [2020-10-29 09:52:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:31,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:31,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:31,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:32,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:32,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:52:32,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:32,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-29 09:52:32,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:32,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:32,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:52:32,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:32,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:52:32,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:32,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:32,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:32,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:32,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:32,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:32,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:32,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:32,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:32,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:32,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:32,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:32,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:32,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834563973] [2020-10-29 09:52:32,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:32,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:52:32,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53656178] [2020-10-29 09:52:32,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:52:32,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:32,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:52:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:52:32,197 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2020-10-29 09:52:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:32,687 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-29 09:52:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:52:32,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:52:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:32,688 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:52:32,688 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:52:32,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:52:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:52:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:52:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:52:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-29 09:52:32,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-29 09:52:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:32,701 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-29 09:52:32,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:52:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-29 09:52:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:52:32,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:32,703 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:32,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:52:32,703 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1316755235, now seen corresponding path program 8 times [2020-10-29 09:52:32,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:32,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424339030] [2020-10-29 09:52:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:32,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:33,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:52:33,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:33,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-29 09:52:33,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:33,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:33,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:52:33,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:33,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:52:33,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:33,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:33,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:33,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:33,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:33,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:33,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:33,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:33,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:33,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:33,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424339030] [2020-10-29 09:52:33,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:33,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:52:33,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449569119] [2020-10-29 09:52:33,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:52:33,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:33,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:52:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:52:33,198 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2020-10-29 09:52:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:33,649 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-29 09:52:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:52:33,649 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-29 09:52:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:33,650 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:52:33,650 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:52:33,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:52:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:52:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:52:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:52:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-29 09:52:33,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-29 09:52:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:33,662 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-29 09:52:33,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:52:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-29 09:52:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:52:33,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:33,663 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:33,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:52:33,663 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1063047097, now seen corresponding path program 9 times [2020-10-29 09:52:33,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:33,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82635001] [2020-10-29 09:52:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:33,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:33,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:52:33,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-29 09:52:33,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:33,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:52:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:52:33,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:34,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:34,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:34,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:34,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:34,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:34,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:34,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:34,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:34,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:34,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:34,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82635001] [2020-10-29 09:52:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:34,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:52:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695592959] [2020-10-29 09:52:34,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:52:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:52:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:52:34,166 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 13 states. [2020-10-29 09:52:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:34,653 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-29 09:52:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:52:34,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:52:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:34,656 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:52:34,656 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:52:34,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:52:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:52:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:52:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:52:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-29 09:52:34,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-29 09:52:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-29 09:52:34,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:52:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-29 09:52:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:52:34,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:34,668 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:34,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:52:34,669 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1788029411, now seen corresponding path program 10 times [2020-10-29 09:52:34,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:34,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070977642] [2020-10-29 09:52:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:34,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:35,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:35,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:52:35,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:35,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-29 09:52:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:35,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:52:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:52:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:35,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:35,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:35,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:35,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:35,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:52:35,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:35,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:35,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:35,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:35,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:35,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:35,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070977642] [2020-10-29 09:52:35,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:35,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:52:35,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876413921] [2020-10-29 09:52:35,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:52:35,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:52:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:52:35,353 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 14 states. [2020-10-29 09:52:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:35,888 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-29 09:52:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:52:35,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:52:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:35,890 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:52:35,890 INFO L226 Difference]: Without dead ends: 26 [2020-10-29 09:52:35,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:52:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-29 09:52:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-29 09:52:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:52:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-29 09:52:35,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-29 09:52:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:35,897 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-29 09:52:35,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:52:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-29 09:52:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:52:35,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:35,898 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:35,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:52:35,898 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:35,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:35,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1507322631, now seen corresponding path program 11 times [2020-10-29 09:52:35,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:35,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888785364] [2020-10-29 09:52:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:35,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:35,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:36,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:36,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:52:36,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:36,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-29 09:52:36,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:36,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:52:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:52:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:36,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:36,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:36,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:36,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:36,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:36,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:36,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:36,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:36,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:36,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:36,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888785364] [2020-10-29 09:52:36,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:36,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:52:36,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048628646] [2020-10-29 09:52:36,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:52:36,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:52:36,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:52:36,430 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 15 states. [2020-10-29 09:52:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:36,956 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-29 09:52:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:52:36,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:52:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:36,957 INFO L225 Difference]: With dead ends: 33 [2020-10-29 09:52:36,957 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:52:36,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:52:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:52:36,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:52:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:52:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-29 09:52:36,963 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-29 09:52:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:36,963 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-29 09:52:36,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:52:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-29 09:52:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:52:36,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:36,964 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:36,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:52:36,965 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 584020829, now seen corresponding path program 12 times [2020-10-29 09:52:36,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:36,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267279863] [2020-10-29 09:52:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:37,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:52:37,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-29 09:52:37,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:37,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:52:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:52:37,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:37,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:37,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:37,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:37,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:37,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:37,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:37,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:37,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:37,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:37,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:37,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:37,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:37,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267279863] [2020-10-29 09:52:37,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:37,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:52:37,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204908318] [2020-10-29 09:52:37,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:52:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:52:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:52:37,575 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 16 states. [2020-10-29 09:52:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:38,239 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-29 09:52:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:52:38,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:52:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:38,241 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:52:38,241 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:52:38,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:52:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:52:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:52:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:52:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-29 09:52:38,251 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-29 09:52:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:38,252 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-29 09:52:38,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:52:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-29 09:52:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:52:38,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:38,255 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:38,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:52:38,257 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:38,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2026436039, now seen corresponding path program 13 times [2020-10-29 09:52:38,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:38,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706423834] [2020-10-29 09:52:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:38,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:38,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:52:38,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:38,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-29 09:52:38,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:38,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:52:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:38,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:52:38,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:38,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:38,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:38,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:38,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:38,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:38,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:38,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:38,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:38,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:38,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:38,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706423834] [2020-10-29 09:52:38,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:38,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:52:38,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623927702] [2020-10-29 09:52:38,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:52:38,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:38,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:52:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:52:38,890 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 17 states. [2020-10-29 09:52:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:39,564 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-29 09:52:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:52:39,565 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:52:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:39,566 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:52:39,566 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:52:39,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:52:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:52:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:52:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:52:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-29 09:52:39,576 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-29 09:52:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:39,576 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-29 09:52:39,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:52:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-29 09:52:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:52:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:39,580 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:39,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:52:39,581 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash -503332707, now seen corresponding path program 14 times [2020-10-29 09:52:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:39,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027940654] [2020-10-29 09:52:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:39,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:39,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:39,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:52:39,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:39,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-29 09:52:39,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:39,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:52:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:52:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:40,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:40,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:40,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:40,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:40,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:40,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:40,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:40,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:40,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027940654] [2020-10-29 09:52:40,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:40,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:52:40,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577127670] [2020-10-29 09:52:40,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:52:40,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:40,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:52:40,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:52:40,253 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 18 states. [2020-10-29 09:52:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:40,991 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-29 09:52:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:52:40,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:52:40,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:40,992 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:52:40,993 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:52:40,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:52:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:52:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-29 09:52:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:52:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-29 09:52:40,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-29 09:52:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:40,999 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-29 09:52:40,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:52:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-29 09:52:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:52:41,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:41,000 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:41,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:52:41,001 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1616752505, now seen corresponding path program 15 times [2020-10-29 09:52:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:41,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529840521] [2020-10-29 09:52:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:41,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:52:41,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:41,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-29 09:52:41,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:41,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:41,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:52:41,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:41,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:52:41,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:41,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:41,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:41,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:41,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:41,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:41,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:41,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:41,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:41,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:41,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:41,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:41,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529840521] [2020-10-29 09:52:41,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:41,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:52:41,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224403053] [2020-10-29 09:52:41,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:52:41,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:41,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:52:41,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:52:41,734 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 19 states. [2020-10-29 09:52:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:42,522 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-29 09:52:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:52:42,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:52:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:42,526 INFO L225 Difference]: With dead ends: 37 [2020-10-29 09:52:42,526 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:52:42,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:52:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:52:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:52:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:52:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-29 09:52:42,531 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-29 09:52:42,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:42,532 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-29 09:52:42,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:52:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-29 09:52:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:52:42,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:42,533 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:42,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:52:42,533 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:42,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1773027875, now seen corresponding path program 16 times [2020-10-29 09:52:42,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:42,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287458465] [2020-10-29 09:52:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:42,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:42,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:43,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:52:43,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:43,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-29 09:52:43,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:43,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:52:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:52:43,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:43,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:43,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:43,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:43,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:43,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:52:43,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:43,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:43,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:43,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:43,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287458465] [2020-10-29 09:52:43,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:43,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:52:43,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072629112] [2020-10-29 09:52:43,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:52:43,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:43,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:52:43,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:52:43,324 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 20 states. [2020-10-29 09:52:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:44,209 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-29 09:52:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:52:44,209 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:52:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:44,210 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:52:44,210 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:52:44,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:52:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:52:44,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-29 09:52:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:52:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-29 09:52:44,216 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-29 09:52:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:44,216 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-29 09:52:44,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:52:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-29 09:52:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:52:44,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:44,217 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:44,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:52:44,218 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1972370247, now seen corresponding path program 17 times [2020-10-29 09:52:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278893698] [2020-10-29 09:52:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:44,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:44,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:44,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:52:44,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-29 09:52:44,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:44,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:52:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:44,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:52:44,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:45,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:45,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:45,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:45,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:45,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:45,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:45,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278893698] [2020-10-29 09:52:45,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:45,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:52:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230697327] [2020-10-29 09:52:45,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:52:45,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:52:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:52:45,293 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 21 states. [2020-10-29 09:52:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:46,177 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-29 09:52:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:52:46,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:52:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:46,178 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:52:46,178 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:52:46,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:52:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:52:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:52:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:52:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-29 09:52:46,184 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-29 09:52:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:46,184 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-29 09:52:46,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:52:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-29 09:52:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:52:46,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:46,185 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:46,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:52:46,186 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:46,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2115595037, now seen corresponding path program 18 times [2020-10-29 09:52:46,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:46,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477743011] [2020-10-29 09:52:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:46,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:46,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:46,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:52:46,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:46,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-29 09:52:46,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:46,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:52:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:52:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:47,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:47,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:47,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:47,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:47,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:47,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:52:47,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:47,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:47,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:47,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477743011] [2020-10-29 09:52:47,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:47,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:52:47,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067227281] [2020-10-29 09:52:47,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:52:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:52:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:52:47,063 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 22 states. [2020-10-29 09:52:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:48,044 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-29 09:52:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:52:48,045 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:52:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:48,046 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:52:48,046 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 09:52:48,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:52:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 09:52:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 09:52:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:52:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-29 09:52:48,051 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-29 09:52:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:48,052 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-29 09:52:48,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:52:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-29 09:52:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:52:48,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:48,053 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:48,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:52:48,053 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2034371065, now seen corresponding path program 19 times [2020-10-29 09:52:48,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:48,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561775212] [2020-10-29 09:52:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:48,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:48,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:52:48,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:48,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-29 09:52:48,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:48,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:52:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:52:48,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:48,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:49,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:49,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:49,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:49,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561775212] [2020-10-29 09:52:49,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:49,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:52:49,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405435886] [2020-10-29 09:52:49,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:52:49,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:52:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:52:49,009 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 23 states. [2020-10-29 09:52:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:50,144 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-29 09:52:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:52:50,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-29 09:52:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:50,146 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:52:50,146 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:52:50,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:52:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:52:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:52:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:52:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-29 09:52:50,153 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-29 09:52:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:50,153 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-29 09:52:50,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:52:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-29 09:52:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:52:50,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:50,154 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:50,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:52:50,154 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1834301347, now seen corresponding path program 20 times [2020-10-29 09:52:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:50,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127451447] [2020-10-29 09:52:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:50,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:50,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:50,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:52:50,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:50,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:52:50,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:51,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:51,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:51,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:51,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:51,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:52:51,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:51,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:51,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:51,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127451447] [2020-10-29 09:52:51,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:51,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:52:51,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547162466] [2020-10-29 09:52:51,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:52:51,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:52:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:52:51,165 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 24 states. [2020-10-29 09:52:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:52,296 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-29 09:52:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:52:52,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-29 09:52:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:52,298 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:52:52,298 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:52:52,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:52:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:52:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 09:52:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:52:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-29 09:52:52,311 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-29 09:52:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:52,311 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-29 09:52:52,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:52:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-29 09:52:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:52:52,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:52,316 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:52,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:52:52,316 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 72892615, now seen corresponding path program 21 times [2020-10-29 09:52:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:52,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364058059] [2020-10-29 09:52:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:52,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:52,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:52,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:52,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 647 [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:52:52,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:53,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:53,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:53,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:53,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:53,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:53,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:53,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:53,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:53,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364058059] [2020-10-29 09:52:53,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:53,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:52:53,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026349564] [2020-10-29 09:52:53,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:52:53,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:53,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:52:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:52:53,419 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 25 states. [2020-10-29 09:52:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:54,593 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-29 09:52:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:52:54,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 34 [2020-10-29 09:52:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:54,596 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:52:54,596 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:52:54,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:52:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:52:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:52:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:52:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-29 09:52:54,602 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-29 09:52:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:54,602 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-29 09:52:54,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:52:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-29 09:52:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:52:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:54,603 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:54,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:52:54,603 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:54,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:54,604 INFO L82 PathProgramCache]: Analyzing trace with hash -933636707, now seen corresponding path program 22 times [2020-10-29 09:52:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:54,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670090368] [2020-10-29 09:52:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:54,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:55,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:55,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:52:55,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:55,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-29 09:52:55,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:55,287 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:55,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:52:55,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:55,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:52:55,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:55,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:55,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:55,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:55,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:55,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:52:55,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:55,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:55,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:55,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:55,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670090368] [2020-10-29 09:52:55,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:55,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:52:55,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574139873] [2020-10-29 09:52:55,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:52:55,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:52:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:52:55,767 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 26 states. [2020-10-29 09:52:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:57,040 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-29 09:52:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:52:57,041 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 35 [2020-10-29 09:52:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:57,042 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:52:57,042 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:52:57,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:52:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:52:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-29 09:52:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:52:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-29 09:52:57,047 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-29 09:52:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:57,047 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-29 09:52:57,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:52:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-29 09:52:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:52:57,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:57,048 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:57,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:52:57,048 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2071274617, now seen corresponding path program 23 times [2020-10-29 09:52:57,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:57,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001227407] [2020-10-29 09:52:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:57,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:57,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:57,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:52:57,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-29 09:52:57,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:57,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:52:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:57,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:52:57,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:58,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:58,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:58,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:58,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:58,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:58,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:58,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:58,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:58,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:58,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001227407] [2020-10-29 09:52:58,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:58,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:52:58,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013074592] [2020-10-29 09:52:58,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:52:58,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:58,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:52:58,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:52:58,266 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 27 states. [2020-10-29 09:52:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:59,589 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-29 09:52:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:52:59,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2020-10-29 09:52:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:59,591 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:52:59,591 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:52:59,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:52:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:52:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:52:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:52:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-29 09:52:59,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-29 09:52:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:59,605 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-29 09:52:59,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:52:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-29 09:52:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:52:59,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:59,606 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:59,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:52:59,606 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1316655837, now seen corresponding path program 24 times [2020-10-29 09:52:59,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:59,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638474842] [2020-10-29 09:52:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:59,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:59,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:00,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:53:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-29 09:53:00,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:00,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:53:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:53:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:00,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:00,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:00,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638474842] [2020-10-29 09:53:00,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:00,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:53:00,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394766188] [2020-10-29 09:53:00,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:53:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:53:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:53:00,777 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 28 states. [2020-10-29 09:53:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:02,209 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-29 09:53:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:53:02,210 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-10-29 09:53:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:02,211 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:53:02,211 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:53:02,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:53:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:53:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:53:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:53:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-29 09:53:02,216 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-29 09:53:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:02,217 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-29 09:53:02,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:53:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-29 09:53:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:53:02,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:02,217 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:02,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:53:02,218 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1031682489, now seen corresponding path program 25 times [2020-10-29 09:53:02,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:02,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101390500] [2020-10-29 09:53:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:02,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:02,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:02,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:53:02,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:02,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-29 09:53:02,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:02,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:02,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:53:02,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:02,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:53:02,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:03,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:03,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:03,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:03,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:03,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:03,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:03,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:03,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:03,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101390500] [2020-10-29 09:53:03,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:03,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:53:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333253279] [2020-10-29 09:53:03,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:53:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:53:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:53:03,492 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 29 states. [2020-10-29 09:53:05,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:05,043 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-29 09:53:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:53:05,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-10-29 09:53:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:05,045 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:53:05,045 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:53:05,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:53:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:53:05,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:53:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:53:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-29 09:53:05,050 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-29 09:53:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:05,050 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-29 09:53:05,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:53:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-29 09:53:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:53:05,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:05,051 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:05,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:53:05,051 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash -815726563, now seen corresponding path program 26 times [2020-10-29 09:53:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:05,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450204687] [2020-10-29 09:53:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:05,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:05,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:05,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:05,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:53:05,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:05,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-29 09:53:05,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:05,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:05,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:53:05,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:05,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:53:05,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:06,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:06,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:06,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:53:06,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:06,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:06,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:06,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:06,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:53:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:06,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450204687] [2020-10-29 09:53:06,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:06,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:53:06,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206361843] [2020-10-29 09:53:06,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:53:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:53:06,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:53:06,259 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 30 states. [2020-10-29 09:53:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:07,847 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-29 09:53:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:53:07,847 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 39 [2020-10-29 09:53:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:07,848 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:53:07,848 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:53:07,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:53:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:53:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-29 09:53:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:53:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-29 09:53:07,856 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-29 09:53:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:07,856 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-29 09:53:07,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:53:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-29 09:53:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:53:07,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:07,857 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:07,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:53:07,858 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1583939847, now seen corresponding path program 27 times [2020-10-29 09:53:07,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:07,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872551959] [2020-10-29 09:53:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:07,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:08,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:08,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:53:08,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:08,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-29 09:53:08,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:08,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:08,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:53:08,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:08,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:53:08,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:09,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:09,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:09,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:09,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:09,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:09,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:09,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:09,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:09,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872551959] [2020-10-29 09:53:09,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:09,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:53:09,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596345910] [2020-10-29 09:53:09,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:53:09,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:53:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:53:09,138 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 31 states. [2020-10-29 09:53:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:10,765 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-29 09:53:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:53:10,765 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 40 [2020-10-29 09:53:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:10,766 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:53:10,766 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:53:10,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:53:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:53:10,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:53:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:53:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-29 09:53:10,771 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-29 09:53:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:10,771 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-29 09:53:10,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:53:10,771 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-29 09:53:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:53:10,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:10,772 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:10,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:53:10,772 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1335812771, now seen corresponding path program 28 times [2020-10-29 09:53:10,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:10,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182255252] [2020-10-29 09:53:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:10,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:11,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:11,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 09:53:11,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:53:11,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:12,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:12,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:12,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:12,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:12,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:12,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:12,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:12,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:12,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:12,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182255252] [2020-10-29 09:53:12,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:53:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792769616] [2020-10-29 09:53:12,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:53:12,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:53:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:53:12,147 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 32 states. [2020-10-29 09:53:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:13,964 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-29 09:53:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:53:13,965 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 41 [2020-10-29 09:53:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:13,966 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:53:13,966 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:53:13,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:53:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:53:13,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:53:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:53:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-29 09:53:13,971 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-29 09:53:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:13,971 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-29 09:53:13,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:53:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-29 09:53:13,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:53:13,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:13,972 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:13,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:53:13,972 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:13,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:13,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1653830713, now seen corresponding path program 29 times [2020-10-29 09:53:13,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:13,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218832754] [2020-10-29 09:53:13,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:13,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:53:14,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:14,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:53:14,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:15,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:15,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:15,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:15,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:15,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:15,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:15,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:15,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218832754] [2020-10-29 09:53:15,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:15,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:53:15,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992278144] [2020-10-29 09:53:15,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:53:15,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:15,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:53:15,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:53:15,530 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 33 states. [2020-10-29 09:53:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:17,412 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-29 09:53:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:53:17,413 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-10-29 09:53:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:17,414 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:53:17,414 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:53:17,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:53:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:53:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:53:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:53:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-29 09:53:17,420 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-29 09:53:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:17,420 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-29 09:53:17,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:53:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-29 09:53:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 09:53:17,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:17,421 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:17,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:53:17,421 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1372514973, now seen corresponding path program 30 times [2020-10-29 09:53:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:17,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392033291] [2020-10-29 09:53:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:17,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:17,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:18,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 09:53:18,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:18,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-29 09:53:18,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:18,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:53:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:18,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:53:18,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:18,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:18,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:18,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:18,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392033291] [2020-10-29 09:53:18,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:18,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:53:18,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351128471] [2020-10-29 09:53:18,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:53:18,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:53:18,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:53:18,859 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 34 states. [2020-10-29 09:53:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:20,794 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-29 09:53:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:53:20,795 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 43 [2020-10-29 09:53:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:20,795 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:53:20,795 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:53:20,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:53:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:53:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-29 09:53:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:53:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-29 09:53:20,800 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-29 09:53:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:20,800 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-29 09:53:20,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:53:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-29 09:53:20,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:53:20,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:20,801 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:20,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:53:20,802 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 699950727, now seen corresponding path program 31 times [2020-10-29 09:53:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:20,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297927834] [2020-10-29 09:53:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:20,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:20,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:53:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:21,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:53:21,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:22,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:22,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:22,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:22,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:22,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297927834] [2020-10-29 09:53:22,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:22,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:53:22,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329212729] [2020-10-29 09:53:22,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:53:22,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:53:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:53:22,427 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 35 states. [2020-10-29 09:53:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:24,474 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-29 09:53:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:53:24,474 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-10-29 09:53:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:24,475 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:53:24,476 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:53:24,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:53:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:53:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:53:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:53:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-29 09:53:24,482 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-29 09:53:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:24,482 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-29 09:53:24,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:53:24,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-29 09:53:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 09:53:24,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:24,483 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:24,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:53:24,483 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1325295581, now seen corresponding path program 32 times [2020-10-29 09:53:24,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:24,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856593451] [2020-10-29 09:53:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:24,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:24,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:25,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:53:25,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:26,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:26,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:26,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:26,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:26,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:26,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856593451] [2020-10-29 09:53:26,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:26,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:53:26,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998848767] [2020-10-29 09:53:26,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:53:26,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:26,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:53:26,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:53:26,279 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 36 states. [2020-10-29 09:53:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:28,497 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-29 09:53:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:53:28,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 45 [2020-10-29 09:53:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:28,498 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:53:28,498 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:53:28,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:53:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:53:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:53:28,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:53:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-29 09:53:28,505 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-29 09:53:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:28,505 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-29 09:53:28,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:53:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-29 09:53:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:53:28,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:28,507 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:28,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:53:28,508 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash -763850425, now seen corresponding path program 33 times [2020-10-29 09:53:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:28,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162983657] [2020-10-29 09:53:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:28,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:28,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:29,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:29,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:53:29,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:29,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 937 [2020-10-29 09:53:29,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:29,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:53:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:29,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:53:29,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:30,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:30,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:30,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:30,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:30,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:30,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162983657] [2020-10-29 09:53:30,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:30,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:53:30,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636602948] [2020-10-29 09:53:30,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:53:30,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:30,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:53:30,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:53:30,382 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 37 states. [2020-10-29 09:53:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:32,700 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-29 09:53:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:53:32,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2020-10-29 09:53:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:32,702 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:53:32,702 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:53:32,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:53:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:53:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:53:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:53:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-29 09:53:32,707 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-29 09:53:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:32,707 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-29 09:53:32,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:53:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-29 09:53:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 09:53:32,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:32,709 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:32,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:53:32,709 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1102867171, now seen corresponding path program 34 times [2020-10-29 09:53:32,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:32,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952528744] [2020-10-29 09:53:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:32,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:32,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:33,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:33,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 09:53:33,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:33,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-29 09:53:33,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:33,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:53:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:33,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:53:33,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:34,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:34,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:34,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:34,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:34,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:34,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952528744] [2020-10-29 09:53:34,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:34,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:53:34,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37651790] [2020-10-29 09:53:34,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:53:34,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:53:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:53:34,727 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 38 states. [2020-10-29 09:53:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:37,034 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-29 09:53:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:53:37,035 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2020-10-29 09:53:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:37,036 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:53:37,036 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:53:37,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:53:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:53:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-29 09:53:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:53:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-29 09:53:37,040 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-29 09:53:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:37,040 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-29 09:53:37,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:53:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-29 09:53:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:53:37,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:37,041 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:37,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:53:37,041 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1272515591, now seen corresponding path program 35 times [2020-10-29 09:53:37,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:37,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942088814] [2020-10-29 09:53:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:37,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:37,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:38,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:38,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:53:38,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:38,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1141 [2020-10-29 09:53:38,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:38,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:53:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:53:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:39,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:39,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:39,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:39,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942088814] [2020-10-29 09:53:39,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:39,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:53:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427100589] [2020-10-29 09:53:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:53:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:53:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:53:39,220 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 39 states. [2020-10-29 09:53:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:41,837 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-29 09:53:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:53:41,837 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 48 [2020-10-29 09:53:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:41,838 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:53:41,838 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:53:41,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:53:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:53:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:53:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:53:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-29 09:53:41,842 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-29 09:53:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:41,843 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-29 09:53:41,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:53:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-29 09:53:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 09:53:41,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:41,846 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:41,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:53:41,847 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:41,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1894937181, now seen corresponding path program 36 times [2020-10-29 09:53:41,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:41,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199471738] [2020-10-29 09:53:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:41,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:41,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:43,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:43,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 09:53:43,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-29 09:53:43,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:43,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:53:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:53:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:44,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:44,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:44,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:44,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:44,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:44,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:44,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199471738] [2020-10-29 09:53:44,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:44,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:53:44,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064562769] [2020-10-29 09:53:44,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:53:44,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:53:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:53:44,368 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 40 states. [2020-10-29 09:53:46,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:46,949 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-29 09:53:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:53:46,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-10-29 09:53:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:46,951 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:53:46,951 INFO L226 Difference]: Without dead ends: 52 [2020-10-29 09:53:46,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:53:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-29 09:53:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-29 09:53:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:53:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-29 09:53:46,958 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-29 09:53:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:46,958 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-29 09:53:46,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:53:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-29 09:53:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:53:46,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:46,959 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:46,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:53:46,959 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash -284830009, now seen corresponding path program 37 times [2020-10-29 09:53:46,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:46,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988378282] [2020-10-29 09:53:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:46,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:48,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:48,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:53:48,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:53:48,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:49,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:49,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:49,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:49,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:49,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988378282] [2020-10-29 09:53:49,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:49,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:53:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142244783] [2020-10-29 09:53:49,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:53:49,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:53:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:53:49,331 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 41 states. [2020-10-29 09:53:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:52,023 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-29 09:53:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:53:52,023 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 50 [2020-10-29 09:53:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:52,025 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:53:52,025 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:53:52,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:53:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:53:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:53:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:53:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-29 09:53:52,031 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-29 09:53:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:52,032 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-29 09:53:52,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:53:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-29 09:53:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 09:53:52,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:52,033 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:52,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:53:52,033 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 861863837, now seen corresponding path program 38 times [2020-10-29 09:53:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:52,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851165639] [2020-10-29 09:53:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:52,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:52,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:53,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:53,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 09:53:53,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:53,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1202 [2020-10-29 09:53:53,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:53,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:53,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:53:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:53:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 09:53:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:54,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:54,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:54,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:54,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:54,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:54,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:54,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:54,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851165639] [2020-10-29 09:53:54,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:54,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:53:54,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744996860] [2020-10-29 09:53:54,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:53:54,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:54,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:53:54,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:53:54,453 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 42 states. [2020-10-29 09:53:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:57,406 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-29 09:53:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:53:57,406 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2020-10-29 09:53:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:57,407 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:53:57,407 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:53:57,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:53:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:53:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-29 09:53:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 09:53:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-29 09:53:57,412 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-29 09:53:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:57,412 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-29 09:53:57,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:53:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-29 09:53:57,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:53:57,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:57,413 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:57,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:53:57,413 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:57,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2049634695, now seen corresponding path program 39 times [2020-10-29 09:53:57,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:57,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838778005] [2020-10-29 09:53:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:57,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:53:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:58,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:53:58,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:00,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:00,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:00,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838778005] [2020-10-29 09:54:00,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:00,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:54:00,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390977490] [2020-10-29 09:54:00,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:54:00,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:00,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:54:00,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:54:00,155 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 43 states. [2020-10-29 09:54:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:03,075 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-29 09:54:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:54:03,076 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 52 [2020-10-29 09:54:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:03,077 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:54:03,077 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:54:03,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:54:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:54:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:54:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:54:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-29 09:54:03,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-29 09:54:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:03,081 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-29 09:54:03,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:54:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-29 09:54:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 09:54:03,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:03,082 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:03,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:54:03,082 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 215825629, now seen corresponding path program 40 times [2020-10-29 09:54:03,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:03,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745102556] [2020-10-29 09:54:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:03,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:03,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1326 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:04,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:54:04,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:05,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:05,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:05,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:05,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:05,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745102556] [2020-10-29 09:54:05,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:05,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:54:05,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207883606] [2020-10-29 09:54:05,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:54:05,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:05,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:54:05,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:54:05,830 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 44 states. [2020-10-29 09:54:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:08,896 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-29 09:54:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:54:08,896 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2020-10-29 09:54:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:08,897 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:54:08,897 INFO L226 Difference]: Without dead ends: 56 [2020-10-29 09:54:08,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:54:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-29 09:54:08,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-29 09:54:08,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 09:54:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-29 09:54:08,901 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-29 09:54:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:08,902 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-29 09:54:08,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:54:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-29 09:54:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:54:08,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:08,903 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:08,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:54:08,903 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash -797680569, now seen corresponding path program 41 times [2020-10-29 09:54:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:08,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44567037] [2020-10-29 09:54:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:08,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:10,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:10,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:54:10,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:10,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-29 09:54:10,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:10,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:10,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:54:10,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:10,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:54:10,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:11,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:11,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:11,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:11,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44567037] [2020-10-29 09:54:11,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:11,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:54:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67460767] [2020-10-29 09:54:11,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:54:11,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:54:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:54:11,764 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 45 states. [2020-10-29 09:54:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:14,991 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-29 09:54:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:54:14,992 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-10-29 09:54:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:14,992 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:54:14,992 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:54:14,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:54:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:54:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:54:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:54:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-29 09:54:14,996 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-29 09:54:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:14,997 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-29 09:54:14,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:54:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-29 09:54:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 09:54:14,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:14,997 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:14,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:54:14,998 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:14,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2143365661, now seen corresponding path program 42 times [2020-10-29 09:54:14,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:14,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982398610] [2020-10-29 09:54:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:15,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:15,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:16,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:16,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 09:54:16,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1557 [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:54:16,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:18,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:18,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:18,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:18,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982398610] [2020-10-29 09:54:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:18,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:54:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019456158] [2020-10-29 09:54:18,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:54:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:54:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:54:18,031 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 46 states. [2020-10-29 09:54:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:21,287 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-29 09:54:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:54:21,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2020-10-29 09:54:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:21,289 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:54:21,289 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:54:21,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:54:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:54:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-29 09:54:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-29 09:54:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-29 09:54:21,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-29 09:54:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:21,295 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-29 09:54:21,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:54:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-29 09:54:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:54:21,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:21,296 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:21,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:54:21,296 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:21,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1173481721, now seen corresponding path program 43 times [2020-10-29 09:54:21,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:21,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10366368] [2020-10-29 09:54:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:21,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:22,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1473 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:54:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:24,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:24,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:24,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:24,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:24,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10366368] [2020-10-29 09:54:24,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:24,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:54:24,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996514516] [2020-10-29 09:54:24,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:54:24,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:54:24,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:54:24,352 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 47 states. [2020-10-29 09:54:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:27,752 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-29 09:54:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:54:27,753 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 56 [2020-10-29 09:54:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:27,754 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:54:27,754 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:54:27,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:54:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:54:27,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:54:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:54:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-29 09:54:27,759 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-29 09:54:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:27,759 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-29 09:54:27,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:54:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-29 09:54:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 09:54:27,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:27,760 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:27,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:54:27,761 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash -916535459, now seen corresponding path program 44 times [2020-10-29 09:54:27,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:27,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564122811] [2020-10-29 09:54:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:27,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:29,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:29,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 09:54:29,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:29,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-29 09:54:29,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:29,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:54:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:29,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:54:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:31,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:31,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:31,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:31,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:31,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564122811] [2020-10-29 09:54:31,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:31,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:54:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319242401] [2020-10-29 09:54:31,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:54:31,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:54:31,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:54:31,116 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 48 states. [2020-10-29 09:54:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:34,660 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-29 09:54:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:54:34,660 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 57 [2020-10-29 09:54:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:34,661 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:54:34,662 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:54:34,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:54:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:54:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-29 09:54:34,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-29 09:54:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-29 09:54:34,667 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-29 09:54:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-29 09:54:34,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:54:34,667 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-29 09:54:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:54:34,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:34,668 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:34,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:54:34,668 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1541135929, now seen corresponding path program 45 times [2020-10-29 09:54:34,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:34,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774295142] [2020-10-29 09:54:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:34,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:36,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:54:36,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:36,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:54:36,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:38,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:38,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:38,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:38,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:38,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774295142] [2020-10-29 09:54:38,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:38,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:54:38,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676248535] [2020-10-29 09:54:38,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:54:38,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:38,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:54:38,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:54:38,072 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 49 states. [2020-10-29 09:54:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:41,960 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-29 09:54:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:54:41,960 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 58 [2020-10-29 09:54:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:41,961 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:54:41,962 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:54:41,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:54:41,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:54:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:54:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:54:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-29 09:54:41,966 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-29 09:54:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:41,966 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-29 09:54:41,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:54:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-29 09:54:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 09:54:41,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:41,967 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:41,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:54:41,967 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 571085981, now seen corresponding path program 46 times [2020-10-29 09:54:41,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:41,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611635451] [2020-10-29 09:54:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:44,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:44,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2132 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:54:44,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:45,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:45,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:45,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:45,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:45,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611635451] [2020-10-29 09:54:45,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:45,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:54:45,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389451554] [2020-10-29 09:54:45,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:54:45,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:45,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:54:45,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:54:45,841 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 50 states. [2020-10-29 09:54:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:49,603 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-29 09:54:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-29 09:54:49,603 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-10-29 09:54:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:49,605 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:54:49,605 INFO L226 Difference]: Without dead ends: 62 [2020-10-29 09:54:49,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-29 09:54:49,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-29 09:54:49,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-29 09:54:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-29 09:54:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-29 09:54:49,609 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-29 09:54:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:49,610 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-29 09:54:49,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-29 09:54:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-29 09:54:49,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:54:49,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:49,611 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:49,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:54:49,611 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1625455751, now seen corresponding path program 47 times [2020-10-29 09:54:49,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:49,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642564746] [2020-10-29 09:54:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:49,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:51,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1941 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:54:51,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:54:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:53,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:53,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:53,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:54:53,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:54:53,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:54:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:54:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642564746] [2020-10-29 09:54:53,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:54:53,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-29 09:54:53,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621807852] [2020-10-29 09:54:53,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-29 09:54:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:54:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-29 09:54:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:54:53,435 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 51 states. [2020-10-29 09:54:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:54:57,628 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-29 09:54:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-29 09:54:57,628 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 60 [2020-10-29 09:54:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:54:57,630 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:54:57,630 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:54:57,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-29 09:54:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:54:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-29 09:54:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:54:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-29 09:54:57,634 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-29 09:54:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:54:57,635 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-29 09:54:57,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-29 09:54:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-29 09:54:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 09:54:57,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:54:57,635 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:54:57,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:54:57,635 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:54:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:54:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash -48819747, now seen corresponding path program 48 times [2020-10-29 09:54:57,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:54:57,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386273645] [2020-10-29 09:54:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:54:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:54:57,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:57,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:54:59,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:54:59,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:54:59,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:01,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:01,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:01,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:01,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386273645] [2020-10-29 09:55:01,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:01,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-29 09:55:01,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637128170] [2020-10-29 09:55:01,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-29 09:55:01,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:01,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-29 09:55:01,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 09:55:01,911 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 52 states. [2020-10-29 09:55:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:06,355 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-29 09:55:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-29 09:55:06,356 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 61 [2020-10-29 09:55:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:06,357 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:55:06,357 INFO L226 Difference]: Without dead ends: 64 [2020-10-29 09:55:06,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-29 09:55:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-29 09:55:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-29 09:55:06,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 09:55:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-29 09:55:06,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-29 09:55:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:06,363 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-29 09:55:06,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-29 09:55:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-29 09:55:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:55:06,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:06,363 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:06,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:55:06,364 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:06,364 INFO L82 PathProgramCache]: Analyzing trace with hash -411752633, now seen corresponding path program 49 times [2020-10-29 09:55:06,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:06,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965269397] [2020-10-29 09:55:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:06,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:06,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:08,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:08,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:55:08,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2095 [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:55:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:10,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:10,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:10,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:10,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:10,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:10,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:10,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:10,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:10,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:10,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965269397] [2020-10-29 09:55:10,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:10,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-29 09:55:10,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324723785] [2020-10-29 09:55:10,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-29 09:55:10,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:10,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-29 09:55:10,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:55:10,617 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 53 states. [2020-10-29 09:55:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:15,228 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-29 09:55:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-29 09:55:15,228 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2020-10-29 09:55:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:15,229 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:55:15,230 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:55:15,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-29 09:55:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:55:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-29 09:55:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:55:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-29 09:55:15,234 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-29 09:55:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:15,234 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-29 09:55:15,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-29 09:55:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-29 09:55:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 09:55:15,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:15,235 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:15,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:55:15,235 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1222229789, now seen corresponding path program 50 times [2020-10-29 09:55:15,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:15,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505567473] [2020-10-29 09:55:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:15,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:17,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:17,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 09:55:17,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:17,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2388 [2020-10-29 09:55:17,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:17,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:17,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-29 09:55:17,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:17,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:55:17,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:19,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:19,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:19,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505567473] [2020-10-29 09:55:19,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:19,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-29 09:55:19,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014206657] [2020-10-29 09:55:19,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-29 09:55:19,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-29 09:55:19,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-29 09:55:19,838 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 54 states. [2020-10-29 09:55:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:24,545 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-29 09:55:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-29 09:55:24,546 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 63 [2020-10-29 09:55:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:24,547 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:55:24,548 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:55:24,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-29 09:55:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:55:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-29 09:55:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-29 09:55:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-29 09:55:24,552 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-29 09:55:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:24,553 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-29 09:55:24,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-29 09:55:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-29 09:55:24,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:55:24,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:24,554 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:24,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:55:24,554 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash 336077319, now seen corresponding path program 51 times [2020-10-29 09:55:24,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:24,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348144849] [2020-10-29 09:55:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:26,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:55:26,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:29,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:29,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:29,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:29,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:29,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348144849] [2020-10-29 09:55:29,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:29,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-29 09:55:29,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23026319] [2020-10-29 09:55:29,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-29 09:55:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-29 09:55:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:55:29,205 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 55 states. [2020-10-29 09:55:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:34,000 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-29 09:55:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-29 09:55:34,001 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 64 [2020-10-29 09:55:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:34,002 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:55:34,002 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:55:34,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-29 09:55:34,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:55:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:55:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:55:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-29 09:55:34,007 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-29 09:55:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:34,007 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-29 09:55:34,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-29 09:55:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-29 09:55:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 09:55:34,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:34,008 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:34,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:55:34,008 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:34,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1364845475, now seen corresponding path program 52 times [2020-10-29 09:55:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:34,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378345721] [2020-10-29 09:55:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:34,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:36,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:36,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 09:55:36,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:36,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2598 [2020-10-29 09:55:36,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:36,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:36,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 09:55:36,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:36,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:55:36,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:38,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:38,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:38,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:38,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:38,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:38,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:55:38,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:38,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:38,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:38,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:38,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:38,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:38,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378345721] [2020-10-29 09:55:38,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:38,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-29 09:55:38,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718703065] [2020-10-29 09:55:38,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-29 09:55:38,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-29 09:55:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-29 09:55:38,991 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 56 states. [2020-10-29 09:55:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:43,867 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-29 09:55:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-29 09:55:43,868 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 65 [2020-10-29 09:55:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:43,869 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:55:43,869 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:55:43,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-29 09:55:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:55:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-29 09:55:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 09:55:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-29 09:55:43,873 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-29 09:55:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:43,873 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-29 09:55:43,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-29 09:55:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-29 09:55:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:55:43,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:43,874 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:43,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:55:43,874 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1741122759, now seen corresponding path program 53 times [2020-10-29 09:55:43,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:43,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29781426] [2020-10-29 09:55:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:43,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:43,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:46,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:46,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:55:46,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:46,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2660 [2020-10-29 09:55:46,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:46,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-29 09:55:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:46,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:55:46,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:48,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:48,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:48,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:48,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29781426] [2020-10-29 09:55:48,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:48,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-29 09:55:48,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152486582] [2020-10-29 09:55:48,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-29 09:55:48,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:48,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-29 09:55:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:55:48,941 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 57 states. [2020-10-29 09:55:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:55:54,002 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-29 09:55:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-29 09:55:54,003 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 66 [2020-10-29 09:55:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:55:54,004 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:55:54,004 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:55:54,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-29 09:55:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:55:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-29 09:55:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:55:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-29 09:55:54,008 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-29 09:55:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:55:54,009 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-29 09:55:54,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-29 09:55:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-29 09:55:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 09:55:54,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:55:54,010 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:55:54,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:55:54,010 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:55:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:55:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash -758109795, now seen corresponding path program 54 times [2020-10-29 09:55:54,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:55:54,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825707863] [2020-10-29 09:55:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:55:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:54,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:56,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:56,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 09:55:56,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2679 [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:55:56,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:59,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:55:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:55:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:55:59,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:55:59,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:55:59,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:55:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:55:59,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:55:59,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:55:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:55:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:55:59,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:55:59,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:55:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:55:59,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825707863] [2020-10-29 09:55:59,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:55:59,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-29 09:55:59,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018142503] [2020-10-29 09:55:59,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-29 09:55:59,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:55:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-29 09:55:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-29 09:55:59,137 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 58 states. [2020-10-29 09:56:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:04,231 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-29 09:56:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-29 09:56:04,231 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 67 [2020-10-29 09:56:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:04,233 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:56:04,233 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:56:04,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-29 09:56:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:56:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-29 09:56:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-29 09:56:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-29 09:56:04,237 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-29 09:56:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:04,238 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-29 09:56:04,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-29 09:56:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-29 09:56:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:56:04,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:04,238 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:04,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:56:04,239 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash -924907641, now seen corresponding path program 55 times [2020-10-29 09:56:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:04,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761658310] [2020-10-29 09:56:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:04,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:04,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2786 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:56:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:09,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:09,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:09,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:09,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:09,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:09,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761658310] [2020-10-29 09:56:09,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:09,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-29 09:56:09,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80302864] [2020-10-29 09:56:09,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-29 09:56:09,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:09,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-29 09:56:09,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:56:09,593 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 59 states. [2020-10-29 09:56:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:56:14,905 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-29 09:56:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-29 09:56:14,906 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 68 [2020-10-29 09:56:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:56:14,907 INFO L225 Difference]: With dead ends: 77 [2020-10-29 09:56:14,907 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:56:14,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-29 09:56:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:56:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 09:56:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:56:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-29 09:56:14,912 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-29 09:56:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:56:14,912 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-29 09:56:14,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-29 09:56:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-29 09:56:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 09:56:14,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:56:14,913 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:56:14,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:56:14,913 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:56:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:56:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1800673571, now seen corresponding path program 56 times [2020-10-29 09:56:14,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:56:14,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102674748] [2020-10-29 09:56:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:56:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:14,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:17,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3048 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:56:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:56:17,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:20,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:56:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:56:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:56:20,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:56:20,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:56:20,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:56:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:56:20,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102674748] [2020-10-29 09:56:20,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:56:20,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-29 09:56:20,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602070812] [2020-10-29 09:56:20,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-29 09:56:20,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:56:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-29 09:56:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-29 09:56:20,691 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 60 states.