/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/in-de20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:46:45,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:46:45,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:46:45,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:46:45,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:46:45,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:46:45,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:46:45,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:46:45,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:46:45,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:46:45,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:46:45,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:46:45,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:46:45,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:46:45,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:46:45,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:46:45,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:46:45,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:46:45,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:46:45,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:46:45,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:46:45,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:46:45,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:46:45,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:46:45,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:46:45,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:46:45,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:46:45,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:46:45,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:46:45,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:46:45,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:46:45,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:46:45,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:46:45,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:46:45,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:46:45,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:46:45,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:46:45,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:46:45,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:46:45,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:46:45,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:46:45,694 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 09:46:45,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:46:45,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:46:45,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:46:45,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:46:45,748 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:46:45,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:46:45,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:46:45,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:46:45,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:46:45,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:46:45,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:46:45,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:46:45,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:46:45,750 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:46:45,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:46:45,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:46:45,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:46:45,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:46:45,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:46:45,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:46:45,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:46:45,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:46:45,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:46:45,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:46:45,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:46:45,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:46:45,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:46:45,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:46:45,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:46:45,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:46:46,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:46:46,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:46:46,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:46:46,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:46:46,166 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:46:46,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de20.c [2020-10-29 09:46:46,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ccb397a0/32ea1bba6f824450a3ca7c4bc1de8750/FLAG326a96ce4 [2020-10-29 09:46:46,833 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:46:46,834 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de20.c [2020-10-29 09:46:46,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ccb397a0/32ea1bba6f824450a3ca7c4bc1de8750/FLAG326a96ce4 [2020-10-29 09:46:47,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ccb397a0/32ea1bba6f824450a3ca7c4bc1de8750 [2020-10-29 09:46:47,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:46:47,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:46:47,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:46:47,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:46:47,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:46:47,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180a216d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47, skipping insertion in model container [2020-10-29 09:46:47,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:46:47,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:46:47,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:46:47,500 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:46:47,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:46:47,533 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:46:47,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47 WrapperNode [2020-10-29 09:46:47,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:46:47,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:46:47,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:46:47,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:46:47,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... [2020-10-29 09:46:47,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:46:47,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:46:47,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:46:47,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:46:47,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:46:47,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:46:47,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:46:47,666 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:46:47,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:46:47,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:46:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:46:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:46:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:46:47,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:46:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 09:46:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:46:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:46:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:46:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:46:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:46:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:46:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:46:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:46:48,125 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:46:48,125 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:46:48,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:46:48 BoogieIcfgContainer [2020-10-29 09:46:48,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:46:48,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:46:48,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:46:48,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:46:48,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:46:47" (1/3) ... [2020-10-29 09:46:48,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf724aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:46:48, skipping insertion in model container [2020-10-29 09:46:48,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:46:47" (2/3) ... [2020-10-29 09:46:48,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf724aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:46:48, skipping insertion in model container [2020-10-29 09:46:48,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:46:48" (3/3) ... [2020-10-29 09:46:48,139 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de20.c [2020-10-29 09:46:48,153 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:46:48,158 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:46:48,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:46:48,214 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:46:48,214 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:46:48,214 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:46:48,215 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:46:48,215 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:46:48,215 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:46:48,215 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:46:48,215 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:46:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 09:46:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:46:48,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:48,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:48,264 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:48,274 INFO L82 PathProgramCache]: Analyzing trace with hash -773811684, now seen corresponding path program 1 times [2020-10-29 09:46:48,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:48,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180593563] [2020-10-29 09:46:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:48,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:48,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:48,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:46:48,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-29 09:46:48,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:48,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:48,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:46:48,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:48,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:46:48,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:46:49,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:49,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:49,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:49,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:49,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:46:49,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:49,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:49,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:49,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:49,129 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 09:46:49,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180593563] [2020-10-29 09:46:49,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:46:49,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:46:49,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810460315] [2020-10-29 09:46:49,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:46:49,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:46:49,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:46:49,159 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-29 09:46:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:49,445 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2020-10-29 09:46:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:46:49,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-29 09:46:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:49,455 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:46:49,455 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:46:49,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:46:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:46:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:46:49,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:46:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-29 09:46:49,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2020-10-29 09:46:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:49,504 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-29 09:46:49,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:46:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-29 09:46:49,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:46:49,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:49,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:49,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:46:49,506 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:49,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1443989559, now seen corresponding path program 1 times [2020-10-29 09:46:49,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:49,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003951007] [2020-10-29 09:46:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:49,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:49,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:46:49,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:49,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-29 09:46:49,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:49,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:46:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:49,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:46:49,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:49,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:49,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:49,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:49,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:49,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:49,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 09:46:49,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:49,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:49,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:49,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:49,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:49,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003951007] [2020-10-29 09:46:49,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:46:49,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 09:46:49,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638184825] [2020-10-29 09:46:49,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:46:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:46:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:46:49,836 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-29 09:46:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:49,971 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-29 09:46:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:46:49,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-29 09:46:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:49,973 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:46:49,973 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:46:49,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:46:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:46:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:46:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:46:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-29 09:46:49,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2020-10-29 09:46:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:49,993 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-29 09:46:49,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:46:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-29 09:46:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:46:49,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:49,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:49,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:46:49,994 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2028457144, now seen corresponding path program 1 times [2020-10-29 09:46:49,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:49,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039552318] [2020-10-29 09:46:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:50,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:50,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:50,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:46:50,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:50,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-29 09:46:50,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:50,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:46:50,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:46:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:50,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:50,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:46:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:50,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:50,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:50,215 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 09:46:50,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039552318] [2020-10-29 09:46:50,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:50,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:46:50,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753956471] [2020-10-29 09:46:50,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:46:50,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:46:50,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:46:50,218 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-29 09:46:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:50,380 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-29 09:46:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:46:50,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-29 09:46:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:50,383 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:46:50,383 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:46:50,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:46:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:46:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-29 09:46:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:46:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-29 09:46:50,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-29 09:46:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:50,392 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-29 09:46:50,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:46:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-29 09:46:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:46:50,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:50,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:50,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:46:50,394 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1683293155, now seen corresponding path program 1 times [2020-10-29 09:46:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:50,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050905569] [2020-10-29 09:46:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:50,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:50,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:46:50,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:50,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-29 09:46:50,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:50,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:46:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:50,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:46:50,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:50,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:50,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:50,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:50,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:50,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:50,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:46:50,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:50,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 09:46:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:50,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050905569] [2020-10-29 09:46:50,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:46:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594032487] [2020-10-29 09:46:50,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:46:50,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:46:50,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:46:50,872 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-10-29 09:46:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:51,118 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-29 09:46:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:46:51,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-29 09:46:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:51,120 INFO L225 Difference]: With dead ends: 26 [2020-10-29 09:46:51,120 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:46:51,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:46:51,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:46:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:46:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:46:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-29 09:46:51,134 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-29 09:46:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:51,135 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-29 09:46:51,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:46:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-29 09:46:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:46:51,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:51,136 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:51,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:46:51,136 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:51,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2027206556, now seen corresponding path program 2 times [2020-10-29 09:46:51,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:51,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753501751] [2020-10-29 09:46:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:51,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:51,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:46:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 09:46:51,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:51,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:46:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:46:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:51,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:51,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:51,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:51,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:51,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:51,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:46:51,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:51,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:51,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:51,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:51,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:51,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:51,386 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 09:46:51,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753501751] [2020-10-29 09:46:51,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:51,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:46:51,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095973000] [2020-10-29 09:46:51,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:46:51,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:51,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:46:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:46:51,395 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-10-29 09:46:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:51,656 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-29 09:46:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:46:51,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-29 09:46:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:51,658 INFO L225 Difference]: With dead ends: 33 [2020-10-29 09:46:51,658 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:46:51,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:46:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:46:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-29 09:46:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:46:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-29 09:46:51,671 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-10-29 09:46:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:51,672 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-29 09:46:51,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:46:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-29 09:46:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:46:51,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:51,673 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:51,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:46:51,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash 426855912, now seen corresponding path program 2 times [2020-10-29 09:46:51,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:51,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009676996] [2020-10-29 09:46:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:51,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:51,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:51,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:46:51,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 09:46:51,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:51,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:46:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:46:51,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:51,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:51,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:51,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:51,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:46:51,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:51,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:51,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:51,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009676996] [2020-10-29 09:46:51,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:51,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:46:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016096582] [2020-10-29 09:46:51,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:46:51,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:46:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:46:51,877 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-29 09:46:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:52,069 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-29 09:46:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:46:52,070 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-29 09:46:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:52,071 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:46:52,071 INFO L226 Difference]: Without dead ends: 20 [2020-10-29 09:46:52,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:46:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-29 09:46:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-29 09:46:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-29 09:46:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-29 09:46:52,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-29 09:46:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:52,078 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-29 09:46:52,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:46:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-29 09:46:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:46:52,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:52,079 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:52,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:46:52,080 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash -511770039, now seen corresponding path program 3 times [2020-10-29 09:46:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:52,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800809338] [2020-10-29 09:46:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:52,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:52,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:46:52,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:52,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-29 09:46:52,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:52,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:52,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:46:52,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:52,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:46:52,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:52,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:52,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:52,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:52,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:46:52,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:52,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:52,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:52,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:52,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800809338] [2020-10-29 09:46:52,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:52,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:46:52,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212023047] [2020-10-29 09:46:52,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:46:52,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:52,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:46:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:46:52,339 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-10-29 09:46:52,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:52,590 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-29 09:46:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:46:52,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-29 09:46:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:52,591 INFO L225 Difference]: With dead ends: 29 [2020-10-29 09:46:52,591 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:46:52,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:46:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:46:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-29 09:46:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:46:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-29 09:46:52,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-29 09:46:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:52,599 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-29 09:46:52,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:46:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-29 09:46:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:46:52,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:52,600 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:52,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:46:52,601 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:52,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:52,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1096237624, now seen corresponding path program 3 times [2020-10-29 09:46:52,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:52,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179469816] [2020-10-29 09:46:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:52,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:52,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:52,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:46:52,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:52,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-29 09:46:52,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:52,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:46:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:52,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:46:52,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:52,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:52,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:52,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:52,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:52,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:52,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:46:52,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:52,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:46:52,869 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 09:46:52,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179469816] [2020-10-29 09:46:52,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:52,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:46:52,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846193624] [2020-10-29 09:46:52,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:46:52,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:52,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:46:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:46:52,872 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-10-29 09:46:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:53,158 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-29 09:46:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:46:53,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-29 09:46:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:53,160 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:46:53,160 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:46:53,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:46:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:46:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-10-29 09:46:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:46:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-29 09:46:53,167 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2020-10-29 09:46:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:53,168 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-29 09:46:53,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:46:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-29 09:46:53,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:46:53,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:53,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:53,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:46:53,169 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:53,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1910633156, now seen corresponding path program 4 times [2020-10-29 09:46:53,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:53,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238777575] [2020-10-29 09:46:53,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:53,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:53,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:46:53,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-29 09:46:53,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:53,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:46:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:46:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:53,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:53,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:53,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:53,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:53,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:53,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:46:53,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:53,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:53,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:53,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:53,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:53,578 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 09:46:53,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238777575] [2020-10-29 09:46:53,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:53,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:46:53,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570892792] [2020-10-29 09:46:53,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:46:53,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:53,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:46:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:46:53,581 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 9 states. [2020-10-29 09:46:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:53,887 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-29 09:46:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:46:53,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-29 09:46:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:53,890 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:46:53,890 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:46:53,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:46:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:46:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 09:46:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:46:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 09:46:53,906 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-10-29 09:46:53,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:53,907 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 09:46:53,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:46:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 09:46:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:46:53,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:53,908 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:53,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:46:53,910 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1445708189, now seen corresponding path program 5 times [2020-10-29 09:46:53,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:53,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014457157] [2020-10-29 09:46:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:53,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:54,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:54,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:46:54,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:54,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-29 09:46:54,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:54,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:54,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:46:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:46:54,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:54,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:54,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:54,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:54,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:54,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:46:54,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:54,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:54,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014457157] [2020-10-29 09:46:54,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:54,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:46:54,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050246666] [2020-10-29 09:46:54,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:46:54,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:54,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:46:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:46:54,197 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-10-29 09:46:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:54,648 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-29 09:46:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:46:54,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-29 09:46:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:54,654 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:46:54,655 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:46:54,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:46:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:46:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-10-29 09:46:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:46:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 09:46:54,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-10-29 09:46:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:54,664 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 09:46:54,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:46:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 09:46:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:46:54,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:54,665 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:54,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:46:54,665 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash 861240604, now seen corresponding path program 4 times [2020-10-29 09:46:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:54,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720197058] [2020-10-29 09:46:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:54,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:54,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:54,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:46:54,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:54,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-29 09:46:54,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:54,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:54,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:46:54,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:54,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:46:54,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:54,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:54,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:54,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:54,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:54,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:46:54,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:54,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:54,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:54,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:54,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:54,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:54,949 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 09:46:54,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720197058] [2020-10-29 09:46:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:54,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:46:54,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123129185] [2020-10-29 09:46:54,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:46:54,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:54,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:46:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:46:54,952 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 9 states. [2020-10-29 09:46:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:55,355 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-29 09:46:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:46:55,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-29 09:46:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:55,358 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:46:55,358 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:46:55,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:46:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:46:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-10-29 09:46:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 09:46:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-29 09:46:55,372 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-29 09:46:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:55,372 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-29 09:46:55,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:46:55,373 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-29 09:46:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:46:55,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:55,373 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:55,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:46:55,374 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:55,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1969250473, now seen corresponding path program 6 times [2020-10-29 09:46:55,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:55,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704071426] [2020-10-29 09:46:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:55,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:55,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:55,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:46:55,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:55,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-29 09:46:55,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:55,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:46:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:55,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:46:55,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:55,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:55,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:55,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:55,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:55,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:46:55,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:55,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:55,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:55,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:55,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:55,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:46:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:55,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704071426] [2020-10-29 09:46:55,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:55,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:46:55,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215630820] [2020-10-29 09:46:55,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:46:55,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:46:55,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:46:55,646 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 9 states. [2020-10-29 09:46:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:56,063 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-29 09:46:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:46:56,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-29 09:46:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:56,065 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:46:56,065 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:46:56,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:46:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:46:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-29 09:46:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 09:46:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-29 09:46:56,076 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2020-10-29 09:46:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:56,076 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-29 09:46:56,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:46:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-29 09:46:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:46:56,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:56,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:56,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:46:56,078 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1358350232, now seen corresponding path program 7 times [2020-10-29 09:46:56,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:56,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88473491] [2020-10-29 09:46:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:56,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:56,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:46:56,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:56,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-29 09:46:56,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:56,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:56,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:46:56,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:56,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:46:56,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:56,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:56,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:56,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:56,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:46:56,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:56,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:56,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:56,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:56,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88473491] [2020-10-29 09:46:56,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:56,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:46:56,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786307958] [2020-10-29 09:46:56,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:46:56,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:46:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:46:56,397 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2020-10-29 09:46:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:56,782 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-29 09:46:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:46:56,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-29 09:46:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:56,783 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:46:56,783 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:46:56,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:46:56,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:46:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-29 09:46:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:46:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-29 09:46:56,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-29 09:46:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:56,793 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-29 09:46:56,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:46:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-29 09:46:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:46:56,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:56,793 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:56,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:46:56,794 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:56,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1997991113, now seen corresponding path program 8 times [2020-10-29 09:46:56,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:56,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144474061] [2020-10-29 09:46:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:56,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:46:56,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:56,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:46:56,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:57,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:57,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:57,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:57,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:57,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:57,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:46:57,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:57,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:57,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:57,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:57,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144474061] [2020-10-29 09:46:57,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:57,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:46:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147247020] [2020-10-29 09:46:57,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:46:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:46:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:46:57,116 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-10-29 09:46:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:57,598 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-29 09:46:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:46:57,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-29 09:46:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:57,599 INFO L225 Difference]: With dead ends: 37 [2020-10-29 09:46:57,599 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:46:57,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:46:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:46:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-29 09:46:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:46:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-29 09:46:57,609 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-10-29 09:46:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:57,609 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-29 09:46:57,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:46:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-29 09:46:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:46:57,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:57,610 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:57,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:46:57,611 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1413523528, now seen corresponding path program 5 times [2020-10-29 09:46:57,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:57,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412610915] [2020-10-29 09:46:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:57,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:57,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:57,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:46:57,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:57,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-29 09:46:57,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:57,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:46:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:57,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:46:57,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:57,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:57,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:57,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:57,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:57,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:46:57,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:57,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:57,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:57,931 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 09:46:57,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412610915] [2020-10-29 09:46:57,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:57,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:46:57,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713464737] [2020-10-29 09:46:57,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:46:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:46:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:46:57,934 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2020-10-29 09:46:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:58,372 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-29 09:46:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:46:58,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-29 09:46:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:58,373 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:46:58,374 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:46:58,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:46:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:46:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-29 09:46:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:46:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-29 09:46:58,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-29 09:46:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:58,384 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-29 09:46:58,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:46:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-29 09:46:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:46:58,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:58,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:58,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:46:58,386 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:58,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1910151933, now seen corresponding path program 9 times [2020-10-29 09:46:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:58,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735714201] [2020-10-29 09:46:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:58,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:58,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:58,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:46:58,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:58,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-29 09:46:58,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:58,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:46:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:58,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:46:58,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:59,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:59,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:59,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:59,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:59,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:59,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:46:59,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:59,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:59,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:59,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:59,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735714201] [2020-10-29 09:46:59,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:59,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:46:59,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512247550] [2020-10-29 09:46:59,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:46:59,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:46:59,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:46:59,040 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-29 09:46:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:46:59,515 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-29 09:46:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:46:59,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:46:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:46:59,518 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:46:59,518 INFO L226 Difference]: Without dead ends: 30 [2020-10-29 09:46:59,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:46:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-29 09:46:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-29 09:46:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:46:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:46:59,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-29 09:46:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:46:59,538 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:46:59,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:46:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:46:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:46:59,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:46:59,539 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:46:59,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:46:59,539 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:46:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:46:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1417448772, now seen corresponding path program 10 times [2020-10-29 09:46:59,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:46:59,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567396849] [2020-10-29 09:46:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:46:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:59,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:59,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:59,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:46:59,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:59,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-29 09:46:59,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:59,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:46:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:46:59,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:46:59,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:59,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:46:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:46:59,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:46:59,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:46:59,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:46:59,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:46:59,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:46:59,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:46:59,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:46:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:46:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:46:59,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:46:59,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:46:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:46:59,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567396849] [2020-10-29 09:46:59,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:46:59,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:46:59,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144156389] [2020-10-29 09:46:59,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:46:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:46:59,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:46:59,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:46:59,992 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-29 09:47:00,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:00,554 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-29 09:47:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:47:00,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:47:00,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:00,555 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:47:00,555 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:47:00,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:47:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:47:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2020-10-29 09:47:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:47:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:47:00,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-29 09:47:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:00,573 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:47:00,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:47:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:47:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:47:00,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:00,574 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:00,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:47:00,574 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1938892573, now seen corresponding path program 11 times [2020-10-29 09:47:00,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:00,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801635608] [2020-10-29 09:47:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:00,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:00,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:00,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:47:00,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:00,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-29 09:47:00,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:00,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:47:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:00,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:47:00,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:00,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:00,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:00,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:00,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:00,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:00,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:00,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:00,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:01,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:47:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:01,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801635608] [2020-10-29 09:47:01,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:01,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:47:01,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66505759] [2020-10-29 09:47:01,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:47:01,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:01,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:47:01,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:47:01,012 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-29 09:47:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:01,553 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-29 09:47:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:47:01,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:47:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:01,554 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:47:01,554 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:47:01,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:47:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:47:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2020-10-29 09:47:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:47:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:47:01,569 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-10-29 09:47:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:01,570 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:47:01,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:47:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:47:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:47:01,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:01,572 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:01,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:47:01,573 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1354424988, now seen corresponding path program 6 times [2020-10-29 09:47:01,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:01,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822774125] [2020-10-29 09:47:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:01,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:01,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:47:01,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:01,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:47:01,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:01,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:01,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:01,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:01,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:01,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:01,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:47:01,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:01,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:01,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:01,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:01,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:01,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:01,919 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 09:47:01,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822774125] [2020-10-29 09:47:01,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:01,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:47:01,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699491264] [2020-10-29 09:47:01,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:47:01,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:47:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:47:01,922 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-10-29 09:47:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:02,442 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-29 09:47:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:47:02,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-10-29 09:47:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:02,444 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:47:02,444 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:47:02,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:47:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:47:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-10-29 09:47:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-29 09:47:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-29 09:47:02,455 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-29 09:47:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:02,455 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-29 09:47:02,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:47:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-29 09:47:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:47:02,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:02,456 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:02,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:47:02,456 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 154503944, now seen corresponding path program 12 times [2020-10-29 09:47:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:02,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981347270] [2020-10-29 09:47:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:02,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:02,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:47:02,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-29 09:47:02,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:02,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:47:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:47:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:02,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:02,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:02,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:02,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:02,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:47:02,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:02,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:02,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:02,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:02,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:02,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:02,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981347270] [2020-10-29 09:47:02,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:02,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:47:02,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643609852] [2020-10-29 09:47:02,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:47:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:02,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:47:02,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:47:02,801 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 11 states. [2020-10-29 09:47:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:03,278 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-29 09:47:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:47:03,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-29 09:47:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:03,279 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:47:03,279 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:47:03,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:47:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:47:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-29 09:47:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-29 09:47:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-29 09:47:03,290 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-29 09:47:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:03,291 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-29 09:47:03,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:47:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-29 09:47:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:47:03,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:03,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:03,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:47:03,292 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:03,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:03,292 INFO L82 PathProgramCache]: Analyzing trace with hash 78097193, now seen corresponding path program 13 times [2020-10-29 09:47:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:03,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108614234] [2020-10-29 09:47:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:03,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:03,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:03,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:47:03,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:03,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-29 09:47:03,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:03,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:47:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:03,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:47:03,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:03,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:03,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:03,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:03,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:03,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:47:03,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:03,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:03,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:03,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:03,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108614234] [2020-10-29 09:47:03,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:03,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:47:03,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902849028] [2020-10-29 09:47:03,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:47:03,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:03,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:47:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:47:03,681 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 12 states. [2020-10-29 09:47:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:04,182 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-29 09:47:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:47:04,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-29 09:47:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:04,183 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:47:04,183 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:47:04,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:47:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:47:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-29 09:47:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:47:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-29 09:47:04,202 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-29 09:47:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:04,203 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-29 09:47:04,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:47:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-29 09:47:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:47:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:04,205 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:04,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:47:04,206 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1045463784, now seen corresponding path program 14 times [2020-10-29 09:47:04,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:04,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910184849] [2020-10-29 09:47:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:04,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:04,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:04,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:47:04,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:04,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-29 09:47:04,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:04,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:04,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:47:04,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:04,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:47:04,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:04,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:04,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:04,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:04,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:04,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:04,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:04,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:04,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:04,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:04,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:47:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:04,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910184849] [2020-10-29 09:47:04,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:04,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:47:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310044675] [2020-10-29 09:47:04,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:47:04,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:47:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:47:04,611 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-10-29 09:47:05,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:05,274 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-29 09:47:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:47:05,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-29 09:47:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:05,278 INFO L225 Difference]: With dead ends: 43 [2020-10-29 09:47:05,278 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:47:05,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:47:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:47:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-10-29 09:47:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:47:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-29 09:47:05,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-29 09:47:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:05,290 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-29 09:47:05,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:47:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-29 09:47:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:47:05,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:05,291 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:05,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:47:05,292 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 106837833, now seen corresponding path program 15 times [2020-10-29 09:47:05,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:05,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353772808] [2020-10-29 09:47:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:05,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:05,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:05,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:47:05,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:05,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-29 09:47:05,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:05,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:47:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:05,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:47:05,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:05,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:05,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:05,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:05,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:05,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:05,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:05,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:05,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:05,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:05,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:05,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:05,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353772808] [2020-10-29 09:47:05,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:05,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:47:05,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864077605] [2020-10-29 09:47:05,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:47:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:47:05,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:47:05,677 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-10-29 09:47:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:06,318 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-29 09:47:06,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:47:06,319 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-29 09:47:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:06,320 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:47:06,320 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:47:06,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:47:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:47:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2020-10-29 09:47:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:47:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-29 09:47:06,333 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-29 09:47:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:06,334 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-29 09:47:06,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:47:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-29 09:47:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:47:06,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:06,335 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:06,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:47:06,335 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -477629752, now seen corresponding path program 7 times [2020-10-29 09:47:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:06,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382773040] [2020-10-29 09:47:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:06,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:06,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:06,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:47:06,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:06,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-29 09:47:06,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:06,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:47:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:06,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:47:06,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:06,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:06,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:06,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:06,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:06,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:06,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:47:06,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:06,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:06,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:06,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:06,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:06,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:47:06,726 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 09:47:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382773040] [2020-10-29 09:47:06,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:06,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:47:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746123933] [2020-10-29 09:47:06,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:47:06,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:47:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:47:06,729 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-10-29 09:47:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:07,347 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-29 09:47:07,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:47:07,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-29 09:47:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:07,349 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:47:07,349 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:47:07,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:47:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:47:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-10-29 09:47:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:47:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-29 09:47:07,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2020-10-29 09:47:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:07,367 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-29 09:47:07,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:47:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-29 09:47:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:47:07,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:07,367 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:07,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:47:07,369 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash -804618148, now seen corresponding path program 16 times [2020-10-29 09:47:07,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:07,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915326339] [2020-10-29 09:47:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:07,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:07,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:47:07,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:07,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:47:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:07,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:07,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:07,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:07,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:07,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:07,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:47:07,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:07,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:07,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:07,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:07,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:07,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:07,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915326339] [2020-10-29 09:47:07,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:07,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:47:07,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776709251] [2020-10-29 09:47:07,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:47:07,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:47:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:47:07,899 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2020-10-29 09:47:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:08,312 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-29 09:47:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:47:08,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-29 09:47:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:08,313 INFO L225 Difference]: With dead ends: 41 [2020-10-29 09:47:08,313 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:47:08,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:47:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:47:08,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-29 09:47:08,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:47:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-29 09:47:08,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-29 09:47:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:08,334 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-29 09:47:08,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:47:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-29 09:47:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:47:08,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:08,334 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:08,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:47:08,335 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:08,335 INFO L82 PathProgramCache]: Analyzing trace with hash -881024899, now seen corresponding path program 17 times [2020-10-29 09:47:08,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:08,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135555930] [2020-10-29 09:47:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:08,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:08,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:08,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:47:08,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:08,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-29 09:47:08,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:08,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:47:08,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:08,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:47:08,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:08,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:08,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:08,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:08,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:08,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:08,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:08,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:08,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:08,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:08,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:08,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:08,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:08,794 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 09:47:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135555930] [2020-10-29 09:47:08,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:08,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:47:08,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606693965] [2020-10-29 09:47:08,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:47:08,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:47:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:47:08,796 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-29 09:47:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:09,607 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-29 09:47:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:47:09,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:47:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:09,609 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:47:09,609 INFO L226 Difference]: Without dead ends: 42 [2020-10-29 09:47:09,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:47:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-29 09:47:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2020-10-29 09:47:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:47:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-29 09:47:09,626 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-29 09:47:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:09,626 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-29 09:47:09,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:47:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-29 09:47:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:47:09,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:09,627 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:09,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:47:09,627 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:09,627 INFO L82 PathProgramCache]: Analyzing trace with hash 86341692, now seen corresponding path program 18 times [2020-10-29 09:47:09,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:09,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143774016] [2020-10-29 09:47:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:09,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:09,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:09,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:47:09,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:09,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-29 09:47:09,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:09,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:09,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:47:09,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:09,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:47:09,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:10,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:10,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:10,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:10,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:10,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143774016] [2020-10-29 09:47:10,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:10,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:47:10,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607076233] [2020-10-29 09:47:10,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:47:10,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:47:10,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:47:10,086 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-29 09:47:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:10,916 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-29 09:47:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:47:10,917 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:47:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:10,918 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:47:10,918 INFO L226 Difference]: Without dead ends: 46 [2020-10-29 09:47:10,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:47:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-29 09:47:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2020-10-29 09:47:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:47:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-29 09:47:10,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-29 09:47:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:10,933 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-29 09:47:10,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:47:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-29 09:47:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:47:10,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:10,933 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:10,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:47:10,934 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash -852284259, now seen corresponding path program 19 times [2020-10-29 09:47:10,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:10,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995099178] [2020-10-29 09:47:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:10,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:11,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:47:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:11,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:47:11,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:11,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:11,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:11,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:11,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:11,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:11,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:11,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:11,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:11,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:11,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:11,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:11,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995099178] [2020-10-29 09:47:11,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:11,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:47:11,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591382212] [2020-10-29 09:47:11,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:47:11,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:47:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:47:11,407 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-29 09:47:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:12,136 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-29 09:47:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:47:12,137 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:47:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:12,137 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:47:12,137 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:47:12,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:47:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:47:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-10-29 09:47:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:47:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-29 09:47:12,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-10-29 09:47:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:12,152 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-29 09:47:12,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:47:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-29 09:47:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:47:12,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:12,153 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:12,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:47:12,153 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1436751844, now seen corresponding path program 8 times [2020-10-29 09:47:12,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:12,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479956654] [2020-10-29 09:47:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:12,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:12,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:12,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:47:12,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-29 09:47:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:12,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:47:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:12,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:47:12,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:12,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:12,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:12,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:12,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:12,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:12,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:12,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:12,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:12,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:12,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:12,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:12,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:12,617 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 09:47:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479956654] [2020-10-29 09:47:12,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:12,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:47:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120106949] [2020-10-29 09:47:12,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:47:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:47:12,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:47:12,619 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 13 states. [2020-10-29 09:47:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:13,366 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-10-29 09:47:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:47:13,367 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-29 09:47:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:13,368 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:47:13,368 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:47:13,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:47:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:47:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2020-10-29 09:47:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 09:47:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-29 09:47:13,383 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2020-10-29 09:47:13,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:13,383 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-29 09:47:13,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:47:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-29 09:47:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:47:13,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:13,384 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:13,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:47:13,385 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1895977353, now seen corresponding path program 20 times [2020-10-29 09:47:13,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:13,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042959563] [2020-10-29 09:47:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:13,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:13,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:13,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:47:13,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:47:13,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:13,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:13,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:13,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:13,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:13,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:13,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:13,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:13,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:13,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042959563] [2020-10-29 09:47:13,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:13,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:47:13,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234327142] [2020-10-29 09:47:13,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:47:13,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:47:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:47:13,825 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 13 states. [2020-10-29 09:47:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:14,559 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-29 09:47:14,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:47:14,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-29 09:47:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:14,560 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:47:14,560 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 09:47:14,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:47:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 09:47:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-29 09:47:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-29 09:47:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-29 09:47:14,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2020-10-29 09:47:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:14,580 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-29 09:47:14,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:47:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-29 09:47:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:47:14,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:14,581 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:14,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:47:14,581 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash -472631928, now seen corresponding path program 21 times [2020-10-29 09:47:14,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:14,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359852961] [2020-10-29 09:47:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:14,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:14,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:14,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:47:14,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:14,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-29 09:47:14,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:14,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:47:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:47:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:15,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:15,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:15,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:15,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:15,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:15,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:15,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:15,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:15,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:15,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:15,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:15,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359852961] [2020-10-29 09:47:15,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:15,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:47:15,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740692363] [2020-10-29 09:47:15,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:47:15,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:15,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:47:15,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:47:15,022 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 14 states. [2020-10-29 09:47:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:15,707 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-29 09:47:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:47:15,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:47:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:15,709 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:47:15,709 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 09:47:15,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:47:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 09:47:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-29 09:47:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:47:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-29 09:47:15,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-29 09:47:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:15,721 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-29 09:47:15,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:47:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-29 09:47:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:47:15,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:15,722 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:15,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:47:15,722 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash -549038679, now seen corresponding path program 22 times [2020-10-29 09:47:15,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:15,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650627377] [2020-10-29 09:47:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:15,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:15,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:15,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:47:15,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-29 09:47:15,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:15,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:15,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:47:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:47:15,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:16,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:16,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:16,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:16,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:16,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:16,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:16,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:16,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:16,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:16,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:47:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:16,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650627377] [2020-10-29 09:47:16,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:16,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:47:16,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413457126] [2020-10-29 09:47:16,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:47:16,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:47:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:47:16,209 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-29 09:47:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:17,155 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-29 09:47:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:47:17,155 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:47:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:17,156 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:47:17,156 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:47:17,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:47:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:47:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-10-29 09:47:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:47:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-29 09:47:17,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-29 09:47:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:17,172 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-29 09:47:17,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:47:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-29 09:47:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:47:17,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:17,173 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:17,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:47:17,173 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 418327912, now seen corresponding path program 23 times [2020-10-29 09:47:17,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:17,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780108326] [2020-10-29 09:47:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:17,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:17,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:47:17,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:17,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-29 09:47:17,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:17,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:17,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:47:17,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:17,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:47:17,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:17,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:17,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:17,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:17,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:17,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:17,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:17,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:17,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:17,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780108326] [2020-10-29 09:47:17,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:17,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:47:17,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694245141] [2020-10-29 09:47:17,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:47:17,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:47:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:47:17,641 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-29 09:47:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:18,534 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-29 09:47:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:47:18,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:47:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:18,535 INFO L225 Difference]: With dead ends: 53 [2020-10-29 09:47:18,535 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:47:18,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:47:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:47:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-10-29 09:47:18,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:47:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-29 09:47:18,553 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-29 09:47:18,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:18,553 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-29 09:47:18,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:47:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-29 09:47:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:47:18,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:18,554 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:18,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:47:18,554 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:18,554 INFO L82 PathProgramCache]: Analyzing trace with hash -520298039, now seen corresponding path program 24 times [2020-10-29 09:47:18,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:18,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862338241] [2020-10-29 09:47:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:18,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:18,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:18,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:47:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:47:18,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:19,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:19,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:19,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:19,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:19,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:19,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862338241] [2020-10-29 09:47:19,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:19,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:47:19,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569533341] [2020-10-29 09:47:19,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:47:19,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:19,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:47:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:47:19,021 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-29 09:47:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:19,865 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-29 09:47:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:47:19,865 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:47:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:19,866 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:47:19,866 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:47:19,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:47:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:47:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2020-10-29 09:47:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:47:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-29 09:47:19,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-29 09:47:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:19,884 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-29 09:47:19,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:47:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-29 09:47:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 09:47:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:19,885 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:19,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:47:19,885 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1104765624, now seen corresponding path program 9 times [2020-10-29 09:47:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:19,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558857737] [2020-10-29 09:47:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:19,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:20,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:20,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 09:47:20,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-29 09:47:20,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:20,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:47:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:20,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:47:20,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:20,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:20,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:20,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:20,354 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 09:47:20,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558857737] [2020-10-29 09:47:20,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:20,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:47:20,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615905835] [2020-10-29 09:47:20,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:47:20,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:47:20,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:47:20,360 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 14 states. [2020-10-29 09:47:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:21,241 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-29 09:47:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:47:21,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2020-10-29 09:47:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:21,242 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:47:21,242 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:47:21,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:47:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:47:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2020-10-29 09:47:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:47:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-29 09:47:21,261 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-29 09:47:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:21,261 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-29 09:47:21,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:47:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-29 09:47:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:47:21,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:21,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:21,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:47:21,262 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:21,263 INFO L82 PathProgramCache]: Analyzing trace with hash -697351715, now seen corresponding path program 25 times [2020-10-29 09:47:21,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:21,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485314138] [2020-10-29 09:47:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:21,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:21,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:21,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:21,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:47:21,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:21,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:21,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:21,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:21,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:21,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:21,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:21,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:21,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:21,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:21,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485314138] [2020-10-29 09:47:21,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:21,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:47:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893248215] [2020-10-29 09:47:21,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:47:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:47:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:47:21,901 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 12 states. [2020-10-29 09:47:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:22,460 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-29 09:47:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:47:22,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-29 09:47:22,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:22,462 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:47:22,462 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:47:22,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:47:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:47:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-29 09:47:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:47:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:47:22,478 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-29 09:47:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:22,478 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:47:22,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:47:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:47:22,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:47:22,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:22,478 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:22,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:47:22,479 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1229006300, now seen corresponding path program 26 times [2020-10-29 09:47:22,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:22,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292942097] [2020-10-29 09:47:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:22,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:22,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:47:22,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:47:22,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:23,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:23,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:23,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:23,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:47:23,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:23,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:23,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:23,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292942097] [2020-10-29 09:47:23,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:23,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:47:23,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104870885] [2020-10-29 09:47:23,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:47:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:47:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:47:23,031 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-29 09:47:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:24,072 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-29 09:47:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:47:24,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:47:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:24,074 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:47:24,074 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:47:24,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:47:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:47:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-10-29 09:47:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:47:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:47:24,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-29 09:47:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:24,094 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:47:24,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:47:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:47:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:47:24,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:24,094 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:24,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:47:24,095 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1152599549, now seen corresponding path program 27 times [2020-10-29 09:47:24,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:24,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85008476] [2020-10-29 09:47:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:24,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:24,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:47:24,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:24,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-29 09:47:24,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:24,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:47:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:24,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:47:24,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:24,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:24,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:24,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:24,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:24,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:24,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:24,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:24,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:24,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:24,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85008476] [2020-10-29 09:47:24,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:24,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:47:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452218940] [2020-10-29 09:47:24,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:47:24,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:24,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:47:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:47:24,661 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-29 09:47:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:25,787 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-29 09:47:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:47:25,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:47:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:25,789 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:47:25,789 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:47:25,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:47:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:47:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-10-29 09:47:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:47:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:47:25,807 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-29 09:47:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:25,807 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:47:25,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:47:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:47:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:47:25,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:25,807 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:25,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:47:25,808 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2119966140, now seen corresponding path program 28 times [2020-10-29 09:47:25,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:25,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351176529] [2020-10-29 09:47:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:25,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:26,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:26,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:47:26,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-29 09:47:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:26,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:26,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:47:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:47:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:26,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:26,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:26,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:26,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:26,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351176529] [2020-10-29 09:47:26,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:26,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:47:26,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119499762] [2020-10-29 09:47:26,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:47:26,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:47:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:47:26,389 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-29 09:47:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:27,460 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-29 09:47:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:47:27,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:47:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:27,461 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:47:27,461 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:47:27,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:47:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:47:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2020-10-29 09:47:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:47:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:47:27,480 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-29 09:47:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:27,480 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:47:27,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:47:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:47:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:47:27,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:27,481 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:27,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:47:27,481 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:27,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1181340189, now seen corresponding path program 29 times [2020-10-29 09:47:27,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:27,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082640643] [2020-10-29 09:47:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:27,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:27,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:47:27,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:27,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:47:27,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:28,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082640643] [2020-10-29 09:47:28,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:28,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:47:28,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935258111] [2020-10-29 09:47:28,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:47:28,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:47:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:47:28,051 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-29 09:47:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:29,040 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-29 09:47:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:47:29,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:47:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:29,042 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:47:29,042 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:47:29,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:47:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:47:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2020-10-29 09:47:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:47:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:47:29,060 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-29 09:47:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:29,061 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:47:29,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:47:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:47:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:47:29,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:29,061 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:29,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:47:29,061 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash 596872604, now seen corresponding path program 10 times [2020-10-29 09:47:29,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:29,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660253993] [2020-10-29 09:47:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:29,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:29,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:29,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:47:29,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-29 09:47:29,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:29,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:47:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:47:29,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:29,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:29,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:29,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:29,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:29,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:29,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:29,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:29,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:29,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:29,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:29,628 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 09:47:29,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660253993] [2020-10-29 09:47:29,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:29,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:47:29,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283758011] [2020-10-29 09:47:29,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:47:29,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:29,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:47:29,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:47:29,630 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 15 states. [2020-10-29 09:47:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:30,606 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-29 09:47:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:47:30,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-29 09:47:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:30,608 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:47:30,608 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:47:30,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:47:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:47:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-10-29 09:47:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 09:47:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-29 09:47:30,630 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 24 [2020-10-29 09:47:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:30,630 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-29 09:47:30,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:47:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-29 09:47:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:30,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:30,631 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:30,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:47:30,631 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 926269480, now seen corresponding path program 30 times [2020-10-29 09:47:30,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:30,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891634450] [2020-10-29 09:47:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:30,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:30,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:30,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:30,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 09:47:30,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:30,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:47:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:47:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:31,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:31,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:31,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:31,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:31,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:31,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:31,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:31,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:31,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:31,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:31,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891634450] [2020-10-29 09:47:31,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:31,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:47:31,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628815811] [2020-10-29 09:47:31,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:47:31,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:47:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:47:31,152 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 15 states. [2020-10-29 09:47:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:31,931 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-29 09:47:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:47:31,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-29 09:47:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:31,933 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:47:31,933 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 09:47:31,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:47:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 09:47:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-29 09:47:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-29 09:47:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-29 09:47:31,950 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-29 09:47:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:31,950 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-29 09:47:31,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:47:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-29 09:47:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:31,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:31,951 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:31,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:47:31,951 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash 513825801, now seen corresponding path program 31 times [2020-10-29 09:47:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:31,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186434419] [2020-10-29 09:47:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:31,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:32,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:32,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:32,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:47:32,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:32,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:32,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:32,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:32,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:32,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:32,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:47:32,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:32,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:32,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:32,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:47:32,564 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 09:47:32,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186434419] [2020-10-29 09:47:32,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:32,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:47:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567145625] [2020-10-29 09:47:32,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:47:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:47:32,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:47:32,566 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 16 states. [2020-10-29 09:47:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:33,462 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-29 09:47:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:47:33,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:47:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:33,463 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:47:33,464 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:47:33,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:47:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:47:33,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-29 09:47:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:47:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-29 09:47:33,489 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-29 09:47:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:33,491 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-29 09:47:33,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:47:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-29 09:47:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:33,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:33,491 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:33,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:47:33,492 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:33,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1854783480, now seen corresponding path program 32 times [2020-10-29 09:47:33,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:33,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897031976] [2020-10-29 09:47:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:33,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:33,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:33,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:33,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:33,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-29 09:47:33,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:33,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:47:33,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:34,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:34,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:34,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:34,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:34,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:34,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897031976] [2020-10-29 09:47:34,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:34,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:47:34,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255622209] [2020-10-29 09:47:34,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:47:34,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:47:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:47:34,104 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-29 09:47:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:35,241 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-29 09:47:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:47:35,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:47:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:35,242 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:47:35,243 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:47:35,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:47:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:47:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-10-29 09:47:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:47:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-29 09:47:35,264 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-29 09:47:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:35,264 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-29 09:47:35,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:47:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-29 09:47:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:35,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:35,265 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:35,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:47:35,265 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:35,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1931190231, now seen corresponding path program 33 times [2020-10-29 09:47:35,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:35,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799807476] [2020-10-29 09:47:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:35,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:35,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:35,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:35,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:47:35,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:35,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:35,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:35,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:35,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:35,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:35,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:35,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:35,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:35,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:35,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:35,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799807476] [2020-10-29 09:47:35,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:35,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:47:35,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757373548] [2020-10-29 09:47:35,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:47:35,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:47:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:47:35,843 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-29 09:47:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:37,057 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-29 09:47:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:47:37,059 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:47:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:37,059 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:47:37,060 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:47:37,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:47:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:47:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-29 09:47:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:47:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-29 09:47:37,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-29 09:47:37,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:37,082 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-29 09:47:37,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:47:37,082 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-29 09:47:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:37,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:37,082 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:37,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:47:37,083 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -963823640, now seen corresponding path program 34 times [2020-10-29 09:47:37,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:37,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846532580] [2020-10-29 09:47:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:37,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:37,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:47:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:37,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:37,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:37,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:37,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:37,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:37,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:37,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846532580] [2020-10-29 09:47:37,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:37,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:47:37,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044717908] [2020-10-29 09:47:37,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:47:37,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:37,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:47:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:47:37,649 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-29 09:47:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:38,940 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-29 09:47:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:47:38,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:47:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:38,942 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:47:38,942 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:47:38,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:47:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:47:38,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2020-10-29 09:47:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:47:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-29 09:47:38,963 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-29 09:47:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:38,963 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-29 09:47:38,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:47:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-29 09:47:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:38,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:38,964 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:38,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:47:38,964 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1902449591, now seen corresponding path program 35 times [2020-10-29 09:47:38,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:38,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413448009] [2020-10-29 09:47:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:38,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:39,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:39,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:39,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:39,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-29 09:47:39,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:39,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:39,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:47:39,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:39,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:39,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:39,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:39,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:39,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:39,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:39,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:39,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:39,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413448009] [2020-10-29 09:47:39,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:39,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:47:39,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501767767] [2020-10-29 09:47:39,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:47:39,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:39,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:47:39,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:47:39,530 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-29 09:47:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:40,688 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-29 09:47:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:47:40,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:47:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:40,690 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:47:40,690 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:47:40,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:47:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:47:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-10-29 09:47:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:47:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-29 09:47:40,713 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-10-29 09:47:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:40,713 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-29 09:47:40,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:47:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-29 09:47:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 09:47:40,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:40,714 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:40,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:47:40,714 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1808050120, now seen corresponding path program 11 times [2020-10-29 09:47:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827967306] [2020-10-29 09:47:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:40,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:41,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:41,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:47:41,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-10-29 09:47:41,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:41,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:47:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:47:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:41,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:41,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:41,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:41,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:41,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:41,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:41,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:41,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:41,296 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 09:47:41,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827967306] [2020-10-29 09:47:41,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:41,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:47:41,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14690364] [2020-10-29 09:47:41,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:47:41,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:41,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:47:41,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:47:41,298 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-10-29 09:47:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:42,398 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-29 09:47:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:47:42,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-10-29 09:47:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:42,400 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:47:42,400 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:47:42,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:47:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:47:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-10-29 09:47:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:47:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-29 09:47:42,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 25 [2020-10-29 09:47:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:42,426 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-29 09:47:42,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:47:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-29 09:47:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:42,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:42,426 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:42,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:47:42,427 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -181933188, now seen corresponding path program 36 times [2020-10-29 09:47:42,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:42,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333529018] [2020-10-29 09:47:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:42,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:42,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:42,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:42,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-29 09:47:42,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:42,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:47:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:42,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:47:42,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:43,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:43,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:43,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:43,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:43,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:47:43,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:43,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:43,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:43,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:47:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:43,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333529018] [2020-10-29 09:47:43,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:43,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:47:43,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064728595] [2020-10-29 09:47:43,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:47:43,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:43,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:47:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:47:43,123 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 13 states. [2020-10-29 09:47:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:44,057 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-29 09:47:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:47:44,058 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-29 09:47:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:44,058 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:47:44,059 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:47:44,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:47:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:47:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-10-29 09:47:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:44,106 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-29 09:47:44,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:44,106 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:44,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:47:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:44,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:44,107 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:44,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-29 09:47:44,107 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash -594376867, now seen corresponding path program 37 times [2020-10-29 09:47:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:44,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117316573] [2020-10-29 09:47:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:44,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:44,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:44,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:44,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-29 09:47:44,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:44,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:44,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:44,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:44,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:44,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:44,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:44,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:44,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:44,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:44,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:44,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:44,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:44,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:44,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117316573] [2020-10-29 09:47:44,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:44,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440021283] [2020-10-29 09:47:44,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:44,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:44,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:44,771 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-29 09:47:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:46,105 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-29 09:47:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:47:46,106 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:47:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:46,107 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:47:46,107 INFO L226 Difference]: Without dead ends: 54 [2020-10-29 09:47:46,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:47:46,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-29 09:47:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-29 09:47:46,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:46,134 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-29 09:47:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:46,135 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:46,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:46,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:46,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:46,135 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:46,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-29 09:47:46,135 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:46,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1331981148, now seen corresponding path program 38 times [2020-10-29 09:47:46,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:46,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640261308] [2020-10-29 09:47:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:46,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:46,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:46,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-29 09:47:46,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:46,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:46,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:46,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:46,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:46,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:46,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:46,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:46,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:46,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:46,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:46,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:46,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:46,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640261308] [2020-10-29 09:47:46,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:46,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:46,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443820687] [2020-10-29 09:47:46,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:46,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:46,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:46,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:46,804 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-29 09:47:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:48,350 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-29 09:47:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:47:48,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:47:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:48,352 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:47:48,352 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:47:48,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:47:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:47:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-10-29 09:47:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:48,383 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-29 09:47:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:48,383 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:48,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:48,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:48,384 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:48,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-29 09:47:48,384 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1255574397, now seen corresponding path program 39 times [2020-10-29 09:47:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340975926] [2020-10-29 09:47:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:48,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:48,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:48,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:48,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:48,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:48,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:49,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340975926] [2020-10-29 09:47:49,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:49,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:49,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123375937] [2020-10-29 09:47:49,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:49,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:49,002 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-29 09:47:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:50,473 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-29 09:47:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:47:50,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:47:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:50,475 INFO L225 Difference]: With dead ends: 71 [2020-10-29 09:47:50,475 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:47:50,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:47:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:47:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2020-10-29 09:47:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:50,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-29 09:47:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:50,509 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:50,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:50,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:50,510 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:50,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-29 09:47:50,510 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2072026308, now seen corresponding path program 40 times [2020-10-29 09:47:50,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:50,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778108348] [2020-10-29 09:47:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:50,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:50,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:50,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:50,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:51,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:51,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:51,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:51,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:51,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:51,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:51,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:51,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:51,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:51,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:51,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778108348] [2020-10-29 09:47:51,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:51,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:51,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106180477] [2020-10-29 09:47:51,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:51,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:51,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:51,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:51,169 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-29 09:47:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:52,532 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-29 09:47:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:47:52,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:47:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:52,533 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:47:52,533 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:47:52,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:47:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:47:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 40. [2020-10-29 09:47:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:52,568 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-29 09:47:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:52,568 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:52,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:52,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:52,569 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:52,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-29 09:47:52,569 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1284315037, now seen corresponding path program 41 times [2020-10-29 09:47:52,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:52,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172829138] [2020-10-29 09:47:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:52,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:52,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:52,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:53,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:53,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:53,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:53,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172829138] [2020-10-29 09:47:53,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:53,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:53,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622749316] [2020-10-29 09:47:53,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:53,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:53,182 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-29 09:47:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:54,520 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-29 09:47:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:47:54,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:47:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:54,522 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:47:54,522 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 09:47:54,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:47:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 09:47:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2020-10-29 09:47:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:54,560 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 26 [2020-10-29 09:47:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:54,560 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:54,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:47:54,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:54,561 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:54,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-29 09:47:54,561 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:54,562 INFO L82 PathProgramCache]: Analyzing trace with hash 699847452, now seen corresponding path program 12 times [2020-10-29 09:47:54,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:54,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352525100] [2020-10-29 09:47:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:54,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:54,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:47:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-29 09:47:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:54,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:54,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:55,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:55,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:55,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:55,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:47:55,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:55,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:55,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:55,144 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 09:47:55,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352525100] [2020-10-29 09:47:55,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:55,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:55,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704729529] [2020-10-29 09:47:55,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:55,146 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 17 states. [2020-10-29 09:47:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:56,403 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2020-10-29 09:47:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:47:56,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-10-29 09:47:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:56,404 INFO L225 Difference]: With dead ends: 83 [2020-10-29 09:47:56,405 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:47:56,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:47:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:47:56,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 42. [2020-10-29 09:47:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-29 09:47:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-29 09:47:56,433 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2020-10-29 09:47:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:56,433 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-29 09:47:56,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-29 09:47:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:47:56,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:56,434 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:56,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-29 09:47:56,434 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:56,435 INFO L82 PathProgramCache]: Analyzing trace with hash -275625367, now seen corresponding path program 42 times [2020-10-29 09:47:56,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:56,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115104037] [2020-10-29 09:47:56,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:56,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:56,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:47:56,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:57,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:57,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:57,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:57,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:57,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115104037] [2020-10-29 09:47:57,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:57,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:47:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617332591] [2020-10-29 09:47:57,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:47:57,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:47:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:47:57,024 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 17 states. [2020-10-29 09:47:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:58,007 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-29 09:47:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:47:58,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-29 09:47:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:58,009 INFO L225 Difference]: With dead ends: 55 [2020-10-29 09:47:58,009 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:47:58,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:47:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:47:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:47:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:47:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-29 09:47:58,049 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-29 09:47:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:58,049 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-29 09:47:58,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:47:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-29 09:47:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:47:58,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:58,050 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:58,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-29 09:47:58,050 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash -176477528, now seen corresponding path program 43 times [2020-10-29 09:47:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:58,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727938465] [2020-10-29 09:47:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:58,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:58,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:47:58,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:47:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:58,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:47:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:58,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:47:58,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:47:58,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:47:58,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:47:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:47:58,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:47:58,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:47:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:47:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:47:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:47:58,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:47:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:47:58,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727938465] [2020-10-29 09:47:58,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:47:58,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:47:58,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701937908] [2020-10-29 09:47:58,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:47:58,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:47:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:47:58,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:47:58,673 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 18 states. [2020-10-29 09:47:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:47:59,770 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-29 09:47:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:47:59,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:47:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:47:59,772 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:47:59,772 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:47:59,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:47:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:47:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-10-29 09:47:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:47:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:47:59,813 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-29 09:47:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:47:59,814 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:47:59,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:47:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:47:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:47:59,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:47:59,814 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:47:59,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-29 09:47:59,815 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:47:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:47:59,815 INFO L82 PathProgramCache]: Analyzing trace with hash -588921207, now seen corresponding path program 44 times [2020-10-29 09:47:59,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:47:59,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074022227] [2020-10-29 09:47:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:47:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:47:59,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:00,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:00,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:00,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-29 09:48:00,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:00,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:48:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:00,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:00,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:00,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:00,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:00,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:00,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:00,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:00,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:00,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:00,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:00,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:00,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:00,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074022227] [2020-10-29 09:48:00,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:00,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:48:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11735935] [2020-10-29 09:48:00,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:48:00,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:00,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:48:00,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:00,535 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-29 09:48:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:02,033 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-29 09:48:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:48:02,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:48:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:02,035 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:48:02,035 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:48:02,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:48:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:48:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2020-10-29 09:48:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:48:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:48:02,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-29 09:48:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:02,071 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:48:02,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:48:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:48:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:02,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:02,072 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:02,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-29 09:48:02,072 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1337436808, now seen corresponding path program 45 times [2020-10-29 09:48:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:02,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534355006] [2020-10-29 09:48:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:02,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:02,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:02,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:02,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:02,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:02,769 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 09:48:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534355006] [2020-10-29 09:48:02,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:02,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:48:02,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607020865] [2020-10-29 09:48:02,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:48:02,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:48:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:02,770 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-29 09:48:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:04,418 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-29 09:48:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:48:04,418 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:48:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:04,419 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:48:04,419 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:48:04,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:48:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:48:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2020-10-29 09:48:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:48:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:48:04,455 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-29 09:48:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:04,455 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:48:04,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:48:04,455 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:48:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:04,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:04,455 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:04,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-29 09:48:04,456 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1261030057, now seen corresponding path program 46 times [2020-10-29 09:48:04,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:04,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508801146] [2020-10-29 09:48:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:48:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:04,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:04,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:05,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:05,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:05,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:05,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:05,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508801146] [2020-10-29 09:48:05,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:05,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:48:05,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978356751] [2020-10-29 09:48:05,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:48:05,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:48:05,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:05,112 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-29 09:48:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:06,749 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-29 09:48:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:48:06,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:48:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:06,751 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:48:06,751 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:48:06,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:48:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:48:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-10-29 09:48:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:48:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:48:06,792 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-29 09:48:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:06,793 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:48:06,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:48:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:48:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:06,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:06,793 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:06,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-29 09:48:06,794 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:06,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:06,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2066570648, now seen corresponding path program 47 times [2020-10-29 09:48:06,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:06,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948021633] [2020-10-29 09:48:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:06,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:07,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:07,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:07,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:07,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:07,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:07,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:07,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948021633] [2020-10-29 09:48:07,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:07,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:48:07,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70305837] [2020-10-29 09:48:07,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:48:07,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:07,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:48:07,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:07,431 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-29 09:48:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:08,940 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-29 09:48:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:48:08,941 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:48:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:08,941 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:48:08,942 INFO L226 Difference]: Without dead ends: 70 [2020-10-29 09:48:08,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:48:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-29 09:48:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2020-10-29 09:48:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:48:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:48:08,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-29 09:48:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:08,985 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:48:08,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:48:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:48:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:08,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:08,986 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:08,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-29 09:48:08,986 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:08,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1289770697, now seen corresponding path program 48 times [2020-10-29 09:48:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:08,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641590182] [2020-10-29 09:48:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:09,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:09,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-29 09:48:09,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:48:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:09,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:09,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:09,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:09,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:09,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:09,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:09,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:09,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641590182] [2020-10-29 09:48:09,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:09,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:48:09,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647805929] [2020-10-29 09:48:09,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:48:09,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:48:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:09,716 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-29 09:48:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:11,158 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-29 09:48:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:48:11,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:48:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:11,159 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:48:11,160 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:48:11,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:48:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:48:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2020-10-29 09:48:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:48:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-29 09:48:11,203 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-29 09:48:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:11,204 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-29 09:48:11,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:48:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-29 09:48:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:48:11,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:11,204 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:11,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-29 09:48:11,205 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash 705303112, now seen corresponding path program 13 times [2020-10-29 09:48:11,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:11,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532227229] [2020-10-29 09:48:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:48:11,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:11,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-29 09:48:11,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:48:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:11,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:48:11,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:11,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:11,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:11,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:11,905 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 09:48:11,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532227229] [2020-10-29 09:48:11,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:11,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:48:11,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579000060] [2020-10-29 09:48:11,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:48:11,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:11,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:48:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:48:11,906 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 18 states. [2020-10-29 09:48:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:13,364 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2020-10-29 09:48:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:48:13,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-10-29 09:48:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:13,366 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:48:13,366 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:48:13,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:48:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:48:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2020-10-29 09:48:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:48:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-29 09:48:13,405 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-29 09:48:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:13,405 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-29 09:48:13,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:48:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-29 09:48:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:13,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:13,406 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:13,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-29 09:48:13,406 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash -106499907, now seen corresponding path program 49 times [2020-10-29 09:48:13,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:13,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366371176] [2020-10-29 09:48:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:13,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:13,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:13,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:13,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:13,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-29 09:48:13,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:13,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:48:13,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:14,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:14,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:14,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:14,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:14,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:14,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:14,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:14,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366371176] [2020-10-29 09:48:14,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:14,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:48:14,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811524363] [2020-10-29 09:48:14,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:48:14,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:48:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:48:14,210 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 14 states. [2020-10-29 09:48:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:14,989 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-29 09:48:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:48:14,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-29 09:48:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:14,991 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:48:14,991 INFO L226 Difference]: Without dead ends: 50 [2020-10-29 09:48:14,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:48:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-29 09:48:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-29 09:48:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:15,035 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:15,035 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:15,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:48:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:15,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:15,036 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:15,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-29 09:48:15,036 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:15,036 INFO L82 PathProgramCache]: Analyzing trace with hash -7352068, now seen corresponding path program 50 times [2020-10-29 09:48:15,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:15,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221883472] [2020-10-29 09:48:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:15,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:15,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:15,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:15,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:15,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:15,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:15,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:15,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221883472] [2020-10-29 09:48:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:15,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937511827] [2020-10-29 09:48:15,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:15,840 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:17,570 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-29 09:48:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:48:17,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:17,572 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:48:17,572 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:48:17,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:48:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:48:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-29 09:48:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:17,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:17,630 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:17,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:17,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:17,630 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:17,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-29 09:48:17,631 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash -419795747, now seen corresponding path program 51 times [2020-10-29 09:48:17,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:17,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175683208] [2020-10-29 09:48:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:17,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:17,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:18,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:18,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:18,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:18,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:18,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:18,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:18,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:18,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:18,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:18,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:18,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:18,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175683208] [2020-10-29 09:48:18,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:18,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:18,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381724011] [2020-10-29 09:48:18,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:18,353 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:20,310 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-29 09:48:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:48:20,311 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:20,312 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:48:20,312 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:48:20,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:48:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:48:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-10-29 09:48:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:20,356 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:20,356 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:20,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:20,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:20,357 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:20,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-29 09:48:20,357 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1506562268, now seen corresponding path program 52 times [2020-10-29 09:48:20,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:20,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867029987] [2020-10-29 09:48:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:20,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:20,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:20,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-29 09:48:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:20,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:21,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:21,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:21,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:21,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:21,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:21,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:21,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:21,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867029987] [2020-10-29 09:48:21,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:21,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585626053] [2020-10-29 09:48:21,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:21,039 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:23,031 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-29 09:48:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:48:23,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:23,032 INFO L225 Difference]: With dead ends: 79 [2020-10-29 09:48:23,033 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:48:23,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=1705, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:48:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:48:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2020-10-29 09:48:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:23,084 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:23,084 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:23,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:23,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:23,085 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:23,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-29 09:48:23,085 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1430155517, now seen corresponding path program 53 times [2020-10-29 09:48:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012300274] [2020-10-29 09:48:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:23,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:23,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:23,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:23,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:23,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:23,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:23,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:23,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:23,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012300274] [2020-10-29 09:48:23,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:23,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:23,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491290613] [2020-10-29 09:48:23,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:23,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:23,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:23,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:23,743 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:25,670 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2020-10-29 09:48:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:48:25,670 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:25,671 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:48:25,672 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 09:48:25,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:48:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 09:48:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 44. [2020-10-29 09:48:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:25,724 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:25,724 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:25,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:25,724 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:25,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-29 09:48:25,725 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1897445188, now seen corresponding path program 54 times [2020-10-29 09:48:25,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:25,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879720303] [2020-10-29 09:48:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:25,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:26,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:26,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:26,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:26,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-29 09:48:26,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:26,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:26,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:26,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:26,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:26,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:26,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:26,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:26,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:26,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:26,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:26,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:26,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:26,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:26,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879720303] [2020-10-29 09:48:26,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:26,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:26,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871235289] [2020-10-29 09:48:26,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:26,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:26,454 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:28,192 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-29 09:48:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:48:28,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:28,194 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:48:28,194 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:48:28,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:48:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:48:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 44. [2020-10-29 09:48:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:28,245 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:28,245 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:28,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:28,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:28,246 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:28,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-29 09:48:28,246 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1458896157, now seen corresponding path program 55 times [2020-10-29 09:48:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:28,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745480229] [2020-10-29 09:48:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:28,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:28,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:28,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:28,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:28,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:28,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:28,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:28,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745480229] [2020-10-29 09:48:28,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:28,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:28,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794399949] [2020-10-29 09:48:28,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:28,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:28,952 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:30,679 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-29 09:48:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:48:30,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:30,681 INFO L225 Difference]: With dead ends: 91 [2020-10-29 09:48:30,681 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:48:30,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:48:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:48:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 44. [2020-10-29 09:48:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:30,755 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 28 [2020-10-29 09:48:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:30,755 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:30,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:48:30,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:30,756 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:30,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-29 09:48:30,756 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash 874428572, now seen corresponding path program 14 times [2020-10-29 09:48:30,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:30,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358837896] [2020-10-29 09:48:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:31,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:31,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:31,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:31,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:31,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:31,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:31,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:31,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:31,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:31,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:31,464 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 09:48:31,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358837896] [2020-10-29 09:48:31,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:31,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:31,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282650702] [2020-10-29 09:48:31,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:31,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:31,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:31,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:31,465 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 19 states. [2020-10-29 09:48:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:33,203 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2020-10-29 09:48:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:48:33,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2020-10-29 09:48:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:33,205 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:48:33,205 INFO L226 Difference]: Without dead ends: 90 [2020-10-29 09:48:33,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:48:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-29 09:48:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2020-10-29 09:48:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-29 09:48:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-29 09:48:33,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 28 [2020-10-29 09:48:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:33,283 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-29 09:48:33,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-29 09:48:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:33,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:33,284 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:33,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-29 09:48:33,284 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2062806344, now seen corresponding path program 56 times [2020-10-29 09:48:33,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:33,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609927783] [2020-10-29 09:48:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:33,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:33,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:33,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:33,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:33,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-29 09:48:33,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:33,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:48:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:33,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:48:33,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:34,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:34,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:34,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:34,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:34,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:34,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:34,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:34,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:34,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:34,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:34,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609927783] [2020-10-29 09:48:34,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:34,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:48:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230165016] [2020-10-29 09:48:34,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:48:34,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:48:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:48:34,216 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 19 states. [2020-10-29 09:48:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:35,466 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-29 09:48:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:48:35,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-29 09:48:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:35,468 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:48:35,468 INFO L226 Difference]: Without dead ends: 44 [2020-10-29 09:48:35,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:48:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-29 09:48:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-29 09:48:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-29 09:48:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-29 09:48:35,512 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 29 [2020-10-29 09:48:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:35,512 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-29 09:48:35,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:48:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-29 09:48:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:35,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:35,513 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:35,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-29 09:48:35,513 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash 841422057, now seen corresponding path program 57 times [2020-10-29 09:48:35,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:35,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788075391] [2020-10-29 09:48:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:35,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:35,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:35,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:36,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:36,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:36,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:36,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:36,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:36,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:48:36,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:36,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:36,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788075391] [2020-10-29 09:48:36,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:36,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781277457] [2020-10-29 09:48:36,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:36,301 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 20 states. [2020-10-29 09:48:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:37,639 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-29 09:48:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:48:37,639 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:37,640 INFO L225 Difference]: With dead ends: 59 [2020-10-29 09:48:37,641 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:48:37,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:48:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:48:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-10-29 09:48:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:37,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:37,699 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:37,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:37,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:37,699 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:37,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-29 09:48:37,700 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 940569896, now seen corresponding path program 58 times [2020-10-29 09:48:37,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:37,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552938265] [2020-10-29 09:48:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:38,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:38,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:38,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:38,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:38,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:38,478 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 09:48:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552938265] [2020-10-29 09:48:38,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:38,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:38,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523260183] [2020-10-29 09:48:38,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:38,480 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:40,306 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-29 09:48:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:48:40,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:40,308 INFO L225 Difference]: With dead ends: 67 [2020-10-29 09:48:40,308 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:48:40,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:48:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:48:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2020-10-29 09:48:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:40,362 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:40,362 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:40,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:40,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:40,362 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:40,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-29 09:48:40,362 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash 528126217, now seen corresponding path program 59 times [2020-10-29 09:48:40,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:40,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630298147] [2020-10-29 09:48:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:40,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:40,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:40,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:40,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:41,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:41,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:41,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:41,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:41,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:41,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:48:41,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:41,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:41,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:41,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:41,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:41,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:41,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630298147] [2020-10-29 09:48:41,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:41,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:41,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60542058] [2020-10-29 09:48:41,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:41,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:41,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:41,182 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:43,378 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-29 09:48:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:48:43,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:43,379 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:48:43,379 INFO L226 Difference]: Without dead ends: 68 [2020-10-29 09:48:43,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:48:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-29 09:48:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-10-29 09:48:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:43,443 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:43,443 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:43,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:43,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:43,444 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:43,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-29 09:48:43,444 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:43,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1840483064, now seen corresponding path program 60 times [2020-10-29 09:48:43,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:43,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632856526] [2020-10-29 09:48:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:43,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:43,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:43,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:43,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:44,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:44,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:44,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:44,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:44,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:44,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:44,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:44,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:44,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632856526] [2020-10-29 09:48:44,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:44,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732137093] [2020-10-29 09:48:44,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:44,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:44,268 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:46,474 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-29 09:48:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:48:46,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:46,476 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:48:46,476 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:48:46,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:48:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:48:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2020-10-29 09:48:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:46,536 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:46,536 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:46,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:46,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:46,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:46,537 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:46,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-29 09:48:46,537 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:46,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1916889815, now seen corresponding path program 61 times [2020-10-29 09:48:46,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:46,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731131281] [2020-10-29 09:48:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:46,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:46,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:46,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:46,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:47,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:47,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:47,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:47,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:47,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731131281] [2020-10-29 09:48:47,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:47,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:47,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967482195] [2020-10-29 09:48:47,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:47,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:47,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:47,419 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:49,480 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-29 09:48:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:48:49,481 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:49,482 INFO L225 Difference]: With dead ends: 85 [2020-10-29 09:48:49,482 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:48:49,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:48:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:48:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 45. [2020-10-29 09:48:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:49,580 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:49,581 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:49,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:49,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:49,581 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:49,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-29 09:48:49,582 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash -949523224, now seen corresponding path program 62 times [2020-10-29 09:48:49,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:49,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268522177] [2020-10-29 09:48:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:49,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:50,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:50,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:50,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:50,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:50,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:50,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:50,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:50,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268522177] [2020-10-29 09:48:50,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:50,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:50,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766876300] [2020-10-29 09:48:50,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:50,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:50,555 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:52,559 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-10-29 09:48:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:48:52,559 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:52,560 INFO L225 Difference]: With dead ends: 89 [2020-10-29 09:48:52,561 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:48:52,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:48:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:48:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 45. [2020-10-29 09:48:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:52,618 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:52,618 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:52,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:52,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:52,618 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:52,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-29 09:48:52,618 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1888149175, now seen corresponding path program 63 times [2020-10-29 09:48:52,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:52,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247591315] [2020-10-29 09:48:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:52,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:52,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:52,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:53,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:53,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:53,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:53,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:53,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:53,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:48:53,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247591315] [2020-10-29 09:48:53,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:53,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:53,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815860131] [2020-10-29 09:48:53,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:53,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:53,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:53,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:53,423 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:55,370 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-10-29 09:48:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:48:55,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:55,372 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:48:55,372 INFO L226 Difference]: Without dead ends: 86 [2020-10-29 09:48:55,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:48:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-29 09:48:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 45. [2020-10-29 09:48:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:48:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-29 09:48:55,469 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 29 [2020-10-29 09:48:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:55,469 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-29 09:48:55,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-29 09:48:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:48:55,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:55,470 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:55,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-29 09:48:55,470 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1822350536, now seen corresponding path program 15 times [2020-10-29 09:48:55,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:55,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962005824] [2020-10-29 09:48:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:55,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:48:55,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:56,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:48:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:56,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:56,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:48:56,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:48:56,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:56,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:56,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:48:56,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:48:56,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:48:56,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:48:56,257 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 09:48:56,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962005824] [2020-10-29 09:48:56,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:48:56,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:48:56,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156077887] [2020-10-29 09:48:56,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:48:56,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:48:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:48:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:48:56,259 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 20 states. [2020-10-29 09:48:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:48:58,166 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2020-10-29 09:48:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:48:58,167 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-10-29 09:48:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:48:58,168 INFO L225 Difference]: With dead ends: 97 [2020-10-29 09:48:58,168 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:48:58,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:48:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:48:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2020-10-29 09:48:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:48:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-29 09:48:58,240 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2020-10-29 09:48:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:48:58,240 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-29 09:48:58,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:48:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-29 09:48:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:48:58,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:48:58,240 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:48:58,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-29 09:48:58,241 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:48:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:48:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1383616156, now seen corresponding path program 64 times [2020-10-29 09:48:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:48:58,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245047758] [2020-10-29 09:48:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:48:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:48:58,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:48:58,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:48:58,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:48:58,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:48:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-10-29 09:48:58,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:48:58,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:48:58,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:48:58,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:48:58,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:48:58,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:00,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:00,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245047758] [2020-10-29 09:49:00,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:00,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:00,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176246857] [2020-10-29 09:49:00,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:00,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:00,360 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 21 states. [2020-10-29 09:49:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:11,055 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-29 09:49:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:49:11,056 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:11,057 INFO L225 Difference]: With dead ends: 61 [2020-10-29 09:49:11,057 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:49:11,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=126, Invalid=1354, Unknown=2, NotChecked=0, Total=1482 [2020-10-29 09:49:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:49:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-10-29 09:49:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:11,165 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:11,165 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:11,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:11,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:11,165 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:11,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-29 09:49:11,166 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash 162231869, now seen corresponding path program 65 times [2020-10-29 09:49:11,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:11,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670770704] [2020-10-29 09:49:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:11,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:11,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:11,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:11,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:11,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-29 09:49:11,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:11,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:12,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:12,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:12,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670770704] [2020-10-29 09:49:12,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:12,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:12,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749651762] [2020-10-29 09:49:12,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:12,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:12,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:12,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:12,107 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:14,504 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-29 09:49:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:49:14,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:14,506 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:49:14,506 INFO L226 Difference]: Without dead ends: 66 [2020-10-29 09:49:14,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:49:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-29 09:49:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-10-29 09:49:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:14,580 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:14,580 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:14,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:14,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:14,581 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:14,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-29 09:49:14,581 INFO L429 AbstractCegarLoop]: === Iteration 83 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash 261379708, now seen corresponding path program 66 times [2020-10-29 09:49:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:14,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224293063] [2020-10-29 09:49:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:14,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:15,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:15,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:15,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-29 09:49:15,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:15,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:15,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:15,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:15,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:15,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:15,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:15,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224293063] [2020-10-29 09:49:15,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:15,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:15,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758713343] [2020-10-29 09:49:15,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:15,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:15,701 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:18,482 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-29 09:49:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:49:18,486 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:18,486 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:49:18,486 INFO L226 Difference]: Without dead ends: 74 [2020-10-29 09:49:18,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=227, Invalid=2223, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:49:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-29 09:49:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2020-10-29 09:49:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:18,572 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:18,573 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:18,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:18,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:18,573 INFO L422 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:18,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-29 09:49:18,573 INFO L429 AbstractCegarLoop]: === Iteration 84 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash -151063971, now seen corresponding path program 67 times [2020-10-29 09:49:18,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:18,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678112768] [2020-10-29 09:49:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:18,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:19,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:19,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:19,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:19,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-29 09:49:19,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:19,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:19,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:19,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:19,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:19,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:19,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:19,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:19,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:19,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:19,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:19,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678112768] [2020-10-29 09:49:19,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:19,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390925839] [2020-10-29 09:49:19,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:19,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:19,630 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:22,656 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2020-10-29 09:49:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:49:22,657 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:22,658 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:49:22,658 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:49:22,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=228, Invalid=2322, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:49:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:49:22,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2020-10-29 09:49:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:22,737 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:22,737 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:22,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:22,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:22,737 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:22,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-29 09:49:22,738 INFO L429 AbstractCegarLoop]: === Iteration 85 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:22,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1775294044, now seen corresponding path program 68 times [2020-10-29 09:49:22,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:22,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604513110] [2020-10-29 09:49:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:22,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:23,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:23,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:23,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-29 09:49:23,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:23,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:23,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:23,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:23,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:23,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:23,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:23,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:23,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:23,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:23,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604513110] [2020-10-29 09:49:23,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:23,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:23,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216938411] [2020-10-29 09:49:23,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:23,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:23,814 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:26,785 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-29 09:49:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:49:26,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:26,787 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:49:26,787 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:49:26,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:49:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:49:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2020-10-29 09:49:26,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:26,866 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:26,866 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:26,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:26,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:26,867 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:26,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-29 09:49:26,867 INFO L429 AbstractCegarLoop]: === Iteration 86 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:26,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1698887293, now seen corresponding path program 69 times [2020-10-29 09:49:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:26,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69712297] [2020-10-29 09:49:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:26,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:27,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:27,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:27,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:27,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:27,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:27,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:27,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:27,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:27,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:27,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:27,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69712297] [2020-10-29 09:49:27,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:27,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:27,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69497389] [2020-10-29 09:49:27,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:27,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:27,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:27,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:27,908 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:30,681 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-29 09:49:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:49:30,683 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:30,684 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:49:30,684 INFO L226 Difference]: Without dead ends: 92 [2020-10-29 09:49:30,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:49:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-29 09:49:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 48. [2020-10-29 09:49:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:30,763 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:30,763 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:30,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:30,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:30,764 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:30,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-29 09:49:30,764 INFO L429 AbstractCegarLoop]: === Iteration 87 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:30,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1628713412, now seen corresponding path program 70 times [2020-10-29 09:49:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:30,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233919470] [2020-10-29 09:49:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:30,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:31,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:31,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-29 09:49:31,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:31,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:31,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233919470] [2020-10-29 09:49:31,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:31,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612767849] [2020-10-29 09:49:31,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:31,806 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:34,415 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2020-10-29 09:49:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:49:34,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:34,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:34,417 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:49:34,418 INFO L226 Difference]: Without dead ends: 96 [2020-10-29 09:49:34,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:49:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-29 09:49:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2020-10-29 09:49:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:34,506 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:34,506 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:34,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:34,506 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:34,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-29 09:49:34,507 INFO L429 AbstractCegarLoop]: === Iteration 88 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1727627933, now seen corresponding path program 71 times [2020-10-29 09:49:34,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:34,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479803431] [2020-10-29 09:49:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:34,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:34,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-29 09:49:34,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:34,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:35,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:35,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:35,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:35,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:35,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479803431] [2020-10-29 09:49:35,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:35,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532750432] [2020-10-29 09:49:35,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:35,520 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:38,063 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2020-10-29 09:49:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:49:38,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:38,065 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:49:38,065 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:49:38,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:49:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:49:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2020-10-29 09:49:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:38,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 30 [2020-10-29 09:49:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:38,144 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:38,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:49:38,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:38,145 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:38,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-29 09:49:38,145 INFO L429 AbstractCegarLoop]: === Iteration 89 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1143160348, now seen corresponding path program 16 times [2020-10-29 09:49:38,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:38,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337797239] [2020-10-29 09:49:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:38,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:38,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:38,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:49:38,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:38,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-29 09:49:38,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:38,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:38,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:38,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:39,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:39,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:39,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:39,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:39,163 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 09:49:39,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337797239] [2020-10-29 09:49:39,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:39,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:39,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132151010] [2020-10-29 09:49:39,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:39,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:39,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:39,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:39,164 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 21 states. [2020-10-29 09:49:41,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:41,673 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2020-10-29 09:49:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:49:41,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-29 09:49:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:41,676 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:49:41,676 INFO L226 Difference]: Without dead ends: 104 [2020-10-29 09:49:41,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:49:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-29 09:49:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 50. [2020-10-29 09:49:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-29 09:49:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-10-29 09:49:41,755 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2020-10-29 09:49:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:41,755 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-10-29 09:49:41,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-10-29 09:49:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:41,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:41,756 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:41,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-29 09:49:41,756 INFO L429 AbstractCegarLoop]: === Iteration 90 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1011764041, now seen corresponding path program 72 times [2020-10-29 09:49:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203949785] [2020-10-29 09:49:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:42,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:42,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:42,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-29 09:49:42,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:42,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:49:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:42,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:49:42,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:42,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:42,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:42,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:42,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:42,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:42,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:42,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:42,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:42,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:42,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:42,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:42,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203949785] [2020-10-29 09:49:42,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:42,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:49:42,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319308293] [2020-10-29 09:49:42,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:49:42,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:42,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:49:42,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:49:42,741 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 21 states. [2020-10-29 09:49:44,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:44,492 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-29 09:49:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:49:44,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-29 09:49:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:44,494 INFO L225 Difference]: With dead ends: 65 [2020-10-29 09:49:44,494 INFO L226 Difference]: Without dead ends: 48 [2020-10-29 09:49:44,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:49:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-29 09:49:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-29 09:49:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-29 09:49:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-29 09:49:44,570 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 31 [2020-10-29 09:49:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:44,570 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-29 09:49:44,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:49:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-29 09:49:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:44,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:44,570 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:44,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-29 09:49:44,571 INFO L429 AbstractCegarLoop]: === Iteration 91 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1803556808, now seen corresponding path program 73 times [2020-10-29 09:49:44,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:44,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607616741] [2020-10-29 09:49:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:44,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:45,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:49:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:45,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:45,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:45,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:45,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:45,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:45,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607616741] [2020-10-29 09:49:45,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:45,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:49:45,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640244641] [2020-10-29 09:49:45,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:49:45,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:49:45,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:49:45,679 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 22 states. [2020-10-29 09:49:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:47,486 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-29 09:49:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:49:47,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:49:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:47,488 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:49:47,488 INFO L226 Difference]: Without dead ends: 58 [2020-10-29 09:49:47,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:49:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-29 09:49:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-29 09:49:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:49:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:49:47,580 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:49:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:47,580 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:49:47,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:49:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:49:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:47,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:47,581 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:47,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-29 09:49:47,581 INFO L429 AbstractCegarLoop]: === Iteration 92 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 582172521, now seen corresponding path program 74 times [2020-10-29 09:49:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373377756] [2020-10-29 09:49:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:47,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:48,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:48,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:48,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-29 09:49:48,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:48,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:49:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:48,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:49:48,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:48,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:48,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:48,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:48,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:48,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:49:48,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:48,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:48,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373377756] [2020-10-29 09:49:48,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:48,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:49:48,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559351786] [2020-10-29 09:49:48,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:49:48,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:49:48,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:49:48,690 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:49:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:51,268 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-29 09:49:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:49:51,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:49:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:51,270 INFO L225 Difference]: With dead ends: 73 [2020-10-29 09:49:51,270 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:49:51,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:49:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:49:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 49. [2020-10-29 09:49:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:49:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:49:51,363 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:49:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:51,363 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:49:51,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:49:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:49:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:51,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:51,364 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:51,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-29 09:49:51,364 INFO L429 AbstractCegarLoop]: === Iteration 93 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash 681320360, now seen corresponding path program 75 times [2020-10-29 09:49:51,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:51,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268725768] [2020-10-29 09:49:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:51,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:51,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:51,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:51,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-29 09:49:51,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:51,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:49:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:49:51,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:52,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:52,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:52,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:52,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:52,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:49:52,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:52,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:52,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:52,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:52,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268725768] [2020-10-29 09:49:52,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:52,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:49:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669262638] [2020-10-29 09:49:52,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:49:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:49:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:49:52,482 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:49:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:55,470 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-29 09:49:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:49:55,471 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:49:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:55,473 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:49:55,473 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:49:55,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2020-10-29 09:49:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:49:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2020-10-29 09:49:55,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:49:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:49:55,572 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:49:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:55,572 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:49:55,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:49:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:49:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:55,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:55,572 INFO L422 BasicCegarLoop]: trace histogram [12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:55,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-10-29 09:49:55,573 INFO L429 AbstractCegarLoop]: === Iteration 94 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 268876681, now seen corresponding path program 76 times [2020-10-29 09:49:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:55,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015871595] [2020-10-29 09:49:55,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:49:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:55,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:56,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:56,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:49:56,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:56,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-29 09:49:56,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:56,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:56,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:49:56,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:49:56,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:49:56,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:56,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:49:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:49:56,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:49:56,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:49:56,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:49:56,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:49:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:49:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:49:56,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015871595] [2020-10-29 09:49:56,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:49:56,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:49:56,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445976777] [2020-10-29 09:49:56,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:49:56,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:49:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:49:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:49:56,719 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:49:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:49:59,901 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-29 09:49:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:49:59,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:49:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:49:59,904 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:49:59,904 INFO L226 Difference]: Without dead ends: 82 [2020-10-29 09:49:59,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=2522, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:49:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-29 09:49:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2020-10-29 09:49:59,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:49:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:49:59,998 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:49:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:49:59,998 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:49:59,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:49:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:49:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:49:59,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:49:59,999 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:49:59,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-10-29 09:49:59,999 INFO L429 AbstractCegarLoop]: === Iteration 95 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:49:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:49:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2099732600, now seen corresponding path program 77 times [2020-10-29 09:49:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:49:59,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14137400] [2020-10-29 09:49:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:00,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:00,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:01,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:01,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:01,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:01,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:01,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:01,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:01,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:01,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:01,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:01,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:01,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14137400] [2020-10-29 09:50:01,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:01,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:01,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607851048] [2020-10-29 09:50:01,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:01,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:01,098 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:50:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:04,254 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-10-29 09:50:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:50:04,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:50:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:04,256 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:50:04,257 INFO L226 Difference]: Without dead ends: 88 [2020-10-29 09:50:04,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:50:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-29 09:50:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2020-10-29 09:50:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:50:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:50:04,370 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:50:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:04,371 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:50:04,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:50:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:50:04,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:04,371 INFO L422 BasicCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:04,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-10-29 09:50:04,371 INFO L429 AbstractCegarLoop]: === Iteration 96 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2118827945, now seen corresponding path program 78 times [2020-10-29 09:50:04,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:04,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365868562] [2020-10-29 09:50:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:04,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:04,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:05,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:05,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:05,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:05,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:05,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:05,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:05,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:05,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:05,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:05,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:05,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:05,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365868562] [2020-10-29 09:50:05,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:05,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:05,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611298808] [2020-10-29 09:50:05,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:05,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:05,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:05,512 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:50:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:08,400 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2020-10-29 09:50:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:50:08,401 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:50:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:08,402 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:50:08,402 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:50:08,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=176, Invalid=1986, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:50:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:50:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2020-10-29 09:50:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:50:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:50:08,497 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:50:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:08,498 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:50:08,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:50:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:50:08,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:08,498 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:08,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-10-29 09:50:08,499 INFO L429 AbstractCegarLoop]: === Iteration 97 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1208772760, now seen corresponding path program 79 times [2020-10-29 09:50:08,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:08,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632693759] [2020-10-29 09:50:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:08,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:09,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:09,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:09,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:09,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:09,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632693759] [2020-10-29 09:50:09,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:09,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:09,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209216928] [2020-10-29 09:50:09,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:09,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:09,595 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:50:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:12,340 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2020-10-29 09:50:12,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:50:12,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:50:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:12,342 INFO L225 Difference]: With dead ends: 103 [2020-10-29 09:50:12,342 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:50:12,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:50:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:50:12,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2020-10-29 09:50:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:50:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:50:12,452 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:50:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:12,452 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:50:12,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:50:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:50:12,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:12,453 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:12,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-10-29 09:50:12,453 INFO L429 AbstractCegarLoop]: === Iteration 98 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:12,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2147398711, now seen corresponding path program 80 times [2020-10-29 09:50:12,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:12,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159581246] [2020-10-29 09:50:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:12,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:13,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:13,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 579 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:13,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:13,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:13,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:13,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:13,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:13,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:13,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:13,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159581246] [2020-10-29 09:50:13,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:13,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:13,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922939871] [2020-10-29 09:50:13,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:13,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:13,646 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:50:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:16,405 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-29 09:50:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:50:16,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:50:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:16,408 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:50:16,408 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 09:50:16,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:50:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 09:50:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 49. [2020-10-29 09:50:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:50:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-29 09:50:16,507 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-29 09:50:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:16,508 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-29 09:50:16,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-29 09:50:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:50:16,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:16,508 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:16,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-10-29 09:50:16,508 INFO L429 AbstractCegarLoop]: === Iteration 99 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1563101000, now seen corresponding path program 17 times [2020-10-29 09:50:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:16,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685688128] [2020-10-29 09:50:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:17,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:17,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:17,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:17,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:17,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:17,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:17,658 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 09:50:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685688128] [2020-10-29 09:50:17,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:17,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:17,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541221402] [2020-10-29 09:50:17,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:17,659 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 22 states. [2020-10-29 09:50:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:20,518 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-10-29 09:50:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:50:20,519 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 31 [2020-10-29 09:50:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:20,520 INFO L225 Difference]: With dead ends: 111 [2020-10-29 09:50:20,520 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:50:20,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:50:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:50:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 51. [2020-10-29 09:50:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:50:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-29 09:50:20,616 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2020-10-29 09:50:20,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:20,616 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-29 09:50:20,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:20,617 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-29 09:50:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:50:20,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:20,617 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:20,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-10-29 09:50:20,617 INFO L429 AbstractCegarLoop]: === Iteration 100 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1145022365, now seen corresponding path program 81 times [2020-10-29 09:50:20,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:20,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011294178] [2020-10-29 09:50:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:21,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:50:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:22,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:22,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:22,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:22,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:22,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:22,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011294178] [2020-10-29 09:50:22,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:22,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:50:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563021603] [2020-10-29 09:50:22,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:50:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:50:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:50:22,569 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 24 states. [2020-10-29 09:50:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:24,620 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-10-29 09:50:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:50:24,621 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-29 09:50:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:24,622 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:50:24,622 INFO L226 Difference]: Without dead ends: 60 [2020-10-29 09:50:24,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:50:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-29 09:50:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-10-29 09:50:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:50:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-29 09:50:24,747 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 32 [2020-10-29 09:50:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:24,747 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-29 09:50:24,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:50:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-29 09:50:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:50:24,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:24,748 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:24,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-10-29 09:50:24,748 INFO L429 AbstractCegarLoop]: === Iteration 101 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:24,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1936815132, now seen corresponding path program 82 times [2020-10-29 09:50:24,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:24,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925477031] [2020-10-29 09:50:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:25,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:50:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:25,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:50:25,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:25,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:25,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:25,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:25,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:25,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:25,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:25,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:25,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:25,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:25,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:25,939 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 09:50:25,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925477031] [2020-10-29 09:50:25,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:25,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:50:25,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97683907] [2020-10-29 09:50:25,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:50:25,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:50:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:25,941 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 23 states. [2020-10-29 09:50:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:28,852 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-10-29 09:50:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:50:28,853 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-10-29 09:50:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:28,854 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:50:28,854 INFO L226 Difference]: Without dead ends: 72 [2020-10-29 09:50:28,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=227, Invalid=2323, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:50:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-29 09:50:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2020-10-29 09:50:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-29 09:50:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-29 09:50:28,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 32 [2020-10-29 09:50:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:28,970 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-29 09:50:28,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:50:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-29 09:50:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:50:28,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:28,970 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:28,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-10-29 09:50:28,971 INFO L429 AbstractCegarLoop]: === Iteration 102 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:28,971 INFO L82 PathProgramCache]: Analyzing trace with hash 715430845, now seen corresponding path program 83 times [2020-10-29 09:50:28,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:28,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763779497] [2020-10-29 09:50:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:29,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:50:29,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:29,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:50:29,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:30,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:30,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:30,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:30,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:30,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:30,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763779497] [2020-10-29 09:50:30,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:30,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:50:30,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462038902] [2020-10-29 09:50:30,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:50:30,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:30,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:50:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:30,180 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 23 states.