/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:41:00,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:41:00,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:41:00,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:41:00,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:41:00,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:41:00,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:41:00,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:41:00,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:41:00,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:41:00,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:41:00,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:41:00,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:41:00,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:41:00,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:41:00,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:41:00,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:41:00,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:41:00,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:41:00,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:41:00,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:41:00,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:41:00,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:41:00,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:41:00,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:41:00,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:41:00,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:41:00,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:41:00,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:41:00,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:41:00,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:41:00,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:41:00,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:41:00,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:41:00,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:41:00,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:41:00,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:41:00,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:41:00,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:41:00,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:41:00,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:41:00,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:41:00,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:41:00,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:41:00,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:41:00,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:41:00,368 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:41:00,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:41:00,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:41:00,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:41:00,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:41:00,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:41:00,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:41:00,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:41:00,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:41:00,373 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:41:00,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:41:00,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:41:00,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:41:00,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:41:00,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:41:00,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:41:00,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:41:00,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:00,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:41:00,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:41:00,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:41:00,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:41:00,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:41:00,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:41:00,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:41:00,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:41:00,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:41:00,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:41:00,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:41:00,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:41:00,884 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:41:00,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 23:41:00,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c010f0e13/8f4b01720f094721aa5281c8ba52825a/FLAGe2b3fe82d [2020-10-27 23:41:01,705 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:41:01,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 23:41:01,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c010f0e13/8f4b01720f094721aa5281c8ba52825a/FLAGe2b3fe82d [2020-10-27 23:41:01,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c010f0e13/8f4b01720f094721aa5281c8ba52825a [2020-10-27 23:41:01,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:41:01,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:41:01,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:01,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:41:01,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:41:01,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:01" (1/1) ... [2020-10-27 23:41:01,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47118ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:01, skipping insertion in model container [2020-10-27 23:41:01,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:41:01" (1/1) ... [2020-10-27 23:41:02,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:41:02,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:41:02,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:02,494 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:41:02,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:41:02,722 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:41:02,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02 WrapperNode [2020-10-27 23:41:02,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:41:02,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:41:02,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:41:02,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:41:02,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... [2020-10-27 23:41:02,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:41:02,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:41:02,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:41:02,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:41:02,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:41:02,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:41:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:41:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:41:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:41:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:41:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:41:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:41:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:41:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:41:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:41:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:41:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:41:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:41:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:41:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:41:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:41:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:41:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:41:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:41:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:41:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:41:02,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:41:04,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:41:04,352 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:41:04,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:04 BoogieIcfgContainer [2020-10-27 23:41:04,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:41:04,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:41:04,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:41:04,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:41:04,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:41:01" (1/3) ... [2020-10-27 23:41:04,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea811b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:04, skipping insertion in model container [2020-10-27 23:41:04,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:41:02" (2/3) ... [2020-10-27 23:41:04,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea811b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:41:04, skipping insertion in model container [2020-10-27 23:41:04,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:41:04" (3/3) ... [2020-10-27 23:41:04,364 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 23:41:04,376 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:41:04,382 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:41:04,396 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:41:04,427 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:41:04,427 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:41:04,427 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:41:04,427 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:41:04,428 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:41:04,428 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:41:04,428 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:41:04,428 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:41:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states. [2020-10-27 23:41:04,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:04,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:04,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:04,469 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash -624284439, now seen corresponding path program 1 times [2020-10-27 23:41:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:04,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638324789] [2020-10-27 23:41:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:04,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:06,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:06,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:08,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:09,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:09,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:09,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:41:09,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 23:41:09,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:09,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:41:09,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:41:10,204 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:10,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:10,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:10,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:10,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:10,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:41:10,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:10,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:10,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:10,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:10,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638324789] [2020-10-27 23:41:10,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:10,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:10,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829107493] [2020-10-27 23:41:10,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:10,308 INFO L87 Difference]: Start difference. First operand 275 states. Second operand 6 states. [2020-10-27 23:41:10,668 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:12,513 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:12,973 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:13,348 INFO L93 Difference]: Finished difference Result 580 states and 971 transitions. [2020-10-27 23:41:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:13,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 23:41:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:13,368 INFO L225 Difference]: With dead ends: 580 [2020-10-27 23:41:13,368 INFO L226 Difference]: Without dead ends: 496 [2020-10-27 23:41:13,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-27 23:41:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 435. [2020-10-27 23:41:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-27 23:41:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 587 transitions. [2020-10-27 23:41:13,500 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 587 transitions. Word has length 52 [2020-10-27 23:41:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:13,501 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 587 transitions. [2020-10-27 23:41:13,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 587 transitions. [2020-10-27 23:41:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:13,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:13,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:13,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:41:13,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -58264428, now seen corresponding path program 1 times [2020-10-27 23:41:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:13,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891225843] [2020-10-27 23:41:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:18,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:18,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:41:18,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:41:18,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:41:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:18,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 23:41:18,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:18,859 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:18,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:18,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:18,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:18,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:18,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:41:18,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:18,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:18,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891225843] [2020-10-27 23:41:18,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:18,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:41:18,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913968238] [2020-10-27 23:41:18,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:41:18,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:18,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:41:18,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:18,906 INFO L87 Difference]: Start difference. First operand 435 states and 587 transitions. Second operand 7 states. [2020-10-27 23:41:19,276 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:20,609 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:41:20,877 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:21,188 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:21,405 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:22,178 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:41:22,466 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:22,973 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:41:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:23,019 INFO L93 Difference]: Finished difference Result 1385 states and 2023 transitions. [2020-10-27 23:41:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:41:23,021 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-27 23:41:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:23,037 INFO L225 Difference]: With dead ends: 1385 [2020-10-27 23:41:23,037 INFO L226 Difference]: Without dead ends: 1215 [2020-10-27 23:41:23,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:41:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2020-10-27 23:41:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 534. [2020-10-27 23:41:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2020-10-27 23:41:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 750 transitions. [2020-10-27 23:41:23,117 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 750 transitions. Word has length 52 [2020-10-27 23:41:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:23,117 INFO L481 AbstractCegarLoop]: Abstraction has 534 states and 750 transitions. [2020-10-27 23:41:23,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:41:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 750 transitions. [2020-10-27 23:41:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:23,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:23,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:23,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:41:23,121 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:23,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2118713766, now seen corresponding path program 1 times [2020-10-27 23:41:23,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:23,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130694697] [2020-10-27 23:41:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:26,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:28,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:28,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:41:28,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:41:28,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:28,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:28,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:28,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:41:28,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:28,445 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:28,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:28,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:28,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:28,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:28,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:28,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:28,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:28,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130694697] [2020-10-27 23:41:28,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:28,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980595249] [2020-10-27 23:41:28,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:28,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:28,491 INFO L87 Difference]: Start difference. First operand 534 states and 750 transitions. Second operand 6 states. [2020-10-27 23:41:28,731 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:29,958 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:30,316 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:30,853 INFO L93 Difference]: Finished difference Result 1513 states and 2246 transitions. [2020-10-27 23:41:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:41:30,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 23:41:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:30,861 INFO L225 Difference]: With dead ends: 1513 [2020-10-27 23:41:30,861 INFO L226 Difference]: Without dead ends: 1267 [2020-10-27 23:41:30,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-10-27 23:41:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1214. [2020-10-27 23:41:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2020-10-27 23:41:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1803 transitions. [2020-10-27 23:41:30,934 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1803 transitions. Word has length 52 [2020-10-27 23:41:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:30,935 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 1803 transitions. [2020-10-27 23:41:30,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1803 transitions. [2020-10-27 23:41:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:30,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:30,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:30,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:41:30,938 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1975459649, now seen corresponding path program 1 times [2020-10-27 23:41:30,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:30,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746586652] [2020-10-27 23:41:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:35,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:35,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:35,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:41:35,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:41:35,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:35,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:35,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:41:35,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:41:36,264 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:36,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:36,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:36,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:36,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:36,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746586652] [2020-10-27 23:41:36,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:36,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150350468] [2020-10-27 23:41:36,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:36,302 INFO L87 Difference]: Start difference. First operand 1214 states and 1803 transitions. Second operand 6 states. [2020-10-27 23:41:36,563 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:37,772 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:38,118 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:38,992 INFO L93 Difference]: Finished difference Result 2525 states and 3829 transitions. [2020-10-27 23:41:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:38,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 23:41:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:39,007 INFO L225 Difference]: With dead ends: 2525 [2020-10-27 23:41:39,008 INFO L226 Difference]: Without dead ends: 2518 [2020-10-27 23:41:39,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2020-10-27 23:41:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1214. [2020-10-27 23:41:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2020-10-27 23:41:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1801 transitions. [2020-10-27 23:41:39,097 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1801 transitions. Word has length 52 [2020-10-27 23:41:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:39,097 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 1801 transitions. [2020-10-27 23:41:39,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:39,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1801 transitions. [2020-10-27 23:41:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:39,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:39,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:39,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:41:39,099 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:39,100 INFO L82 PathProgramCache]: Analyzing trace with hash 936770437, now seen corresponding path program 1 times [2020-10-27 23:41:39,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:39,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008462372] [2020-10-27 23:41:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:39,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:44,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:44,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:41:44,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:41:44,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:41:44,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:44,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:41:44,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:44,534 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:44,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:44,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:44,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:44,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:44,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:44,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:44,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:44,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:44,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:44,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008462372] [2020-10-27 23:41:44,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:44,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:41:44,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031682434] [2020-10-27 23:41:44,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:41:44,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:41:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:41:44,575 INFO L87 Difference]: Start difference. First operand 1214 states and 1801 transitions. Second operand 10 states. [2020-10-27 23:41:44,850 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:46,149 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:41:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:46,580 INFO L93 Difference]: Finished difference Result 1858 states and 2786 transitions. [2020-10-27 23:41:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:41:46,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-10-27 23:41:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:46,590 INFO L225 Difference]: With dead ends: 1858 [2020-10-27 23:41:46,590 INFO L226 Difference]: Without dead ends: 1530 [2020-10-27 23:41:46,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:41:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-10-27 23:41:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1219. [2020-10-27 23:41:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1219 states. [2020-10-27 23:41:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1808 transitions. [2020-10-27 23:41:46,675 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1808 transitions. Word has length 52 [2020-10-27 23:41:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:46,675 INFO L481 AbstractCegarLoop]: Abstraction has 1219 states and 1808 transitions. [2020-10-27 23:41:46,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:41:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1808 transitions. [2020-10-27 23:41:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:46,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:46,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:46,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:41:46,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1183796705, now seen corresponding path program 1 times [2020-10-27 23:41:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:46,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017222251] [2020-10-27 23:41:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:51,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:51,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:41:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:41:51,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:51,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:41:51,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:52,009 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:52,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:52,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:52,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:52,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:52,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:52,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:52,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:52,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017222251] [2020-10-27 23:41:52,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:52,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780714709] [2020-10-27 23:41:52,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:52,055 INFO L87 Difference]: Start difference. First operand 1219 states and 1808 transitions. Second operand 6 states. [2020-10-27 23:41:52,332 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:53,468 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:53,782 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:54,495 INFO L93 Difference]: Finished difference Result 5356 states and 8245 transitions. [2020-10-27 23:41:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:41:54,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 23:41:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:54,520 INFO L225 Difference]: With dead ends: 5356 [2020-10-27 23:41:54,520 INFO L226 Difference]: Without dead ends: 4434 [2020-10-27 23:41:54,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2020-10-27 23:41:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4069. [2020-10-27 23:41:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4069 states. [2020-10-27 23:41:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 6224 transitions. [2020-10-27 23:41:54,755 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 6224 transitions. Word has length 52 [2020-10-27 23:41:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:54,755 INFO L481 AbstractCegarLoop]: Abstraction has 4069 states and 6224 transitions. [2020-10-27 23:41:54,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 6224 transitions. [2020-10-27 23:41:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:41:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:54,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:41:54,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:41:54,758 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -129996473, now seen corresponding path program 1 times [2020-10-27 23:41:54,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:54,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173722257] [2020-10-27 23:41:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:54,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:54,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:55,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:59,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:59,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:41:59,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:41:59,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:41:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:59,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:41:59,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:00,197 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:00,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:00,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173722257] [2020-10-27 23:42:00,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:00,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:42:00,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733958577] [2020-10-27 23:42:00,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:42:00,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:00,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:42:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:00,230 INFO L87 Difference]: Start difference. First operand 4069 states and 6224 transitions. Second operand 11 states. [2020-10-27 23:42:00,583 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:42:02,305 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:02,585 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:02,934 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:42:04,002 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:04,522 INFO L93 Difference]: Finished difference Result 9597 states and 14417 transitions. [2020-10-27 23:42:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 23:42:04,523 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 23:42:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:04,567 INFO L225 Difference]: With dead ends: 9597 [2020-10-27 23:42:04,568 INFO L226 Difference]: Without dead ends: 9589 [2020-10-27 23:42:04,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2020-10-27 23:42:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9589 states. [2020-10-27 23:42:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9589 to 4069. [2020-10-27 23:42:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4069 states. [2020-10-27 23:42:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 6222 transitions. [2020-10-27 23:42:04,923 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 6222 transitions. Word has length 53 [2020-10-27 23:42:04,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:04,924 INFO L481 AbstractCegarLoop]: Abstraction has 4069 states and 6222 transitions. [2020-10-27 23:42:04,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 6222 transitions. [2020-10-27 23:42:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:04,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:04,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:42:04,926 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 914400266, now seen corresponding path program 1 times [2020-10-27 23:42:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:04,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673267320] [2020-10-27 23:42:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:04,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:09,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:09,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 23:42:09,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:42:09,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:42:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:42:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:10,385 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:10,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:10,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:10,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:10,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:10,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:10,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:10,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673267320] [2020-10-27 23:42:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:42:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394189658] [2020-10-27 23:42:10,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:42:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:42:10,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:42:10,426 INFO L87 Difference]: Start difference. First operand 4069 states and 6222 transitions. Second operand 11 states. [2020-10-27 23:42:11,252 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 183 [2020-10-27 23:42:13,113 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 23:42:13,474 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:42:15,390 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:42:15,748 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:16,579 INFO L93 Difference]: Finished difference Result 16376 states and 24779 transitions. [2020-10-27 23:42:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 23:42:16,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 23:42:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:16,636 INFO L225 Difference]: With dead ends: 16376 [2020-10-27 23:42:16,636 INFO L226 Difference]: Without dead ends: 16370 [2020-10-27 23:42:16,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 23:42:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16370 states. [2020-10-27 23:42:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16370 to 4069. [2020-10-27 23:42:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4069 states. [2020-10-27 23:42:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 6221 transitions. [2020-10-27 23:42:17,156 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 6221 transitions. Word has length 53 [2020-10-27 23:42:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:17,156 INFO L481 AbstractCegarLoop]: Abstraction has 4069 states and 6221 transitions. [2020-10-27 23:42:17,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:42:17,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 6221 transitions. [2020-10-27 23:42:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:17,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:17,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:17,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:42:17,158 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:17,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 13201138, now seen corresponding path program 1 times [2020-10-27 23:42:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:17,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530310240] [2020-10-27 23:42:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:17,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:21,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:22,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:42:22,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:22,595 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:22,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:22,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:22,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:22,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:22,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530310240] [2020-10-27 23:42:22,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:22,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:22,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415806285] [2020-10-27 23:42:22,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:22,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:22,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:22,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:22,629 INFO L87 Difference]: Start difference. First operand 4069 states and 6221 transitions. Second operand 10 states. [2020-10-27 23:42:22,898 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:24,321 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:42:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:25,049 INFO L93 Difference]: Finished difference Result 6499 states and 9979 transitions. [2020-10-27 23:42:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:25,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 23:42:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:25,063 INFO L225 Difference]: With dead ends: 6499 [2020-10-27 23:42:25,063 INFO L226 Difference]: Without dead ends: 5211 [2020-10-27 23:42:25,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:42:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5211 states. [2020-10-27 23:42:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5211 to 4053. [2020-10-27 23:42:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4053 states. [2020-10-27 23:42:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6197 transitions. [2020-10-27 23:42:25,475 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6197 transitions. Word has length 53 [2020-10-27 23:42:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:25,476 INFO L481 AbstractCegarLoop]: Abstraction has 4053 states and 6197 transitions. [2020-10-27 23:42:25,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6197 transitions. [2020-10-27 23:42:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:25,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:25,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:25,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:42:25,478 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1599900216, now seen corresponding path program 1 times [2020-10-27 23:42:25,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:25,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091477296] [2020-10-27 23:42:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:25,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:30,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:30,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:42:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:30,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:42:30,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:30,931 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:30,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:30,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:30,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:30,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:30,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:30,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091477296] [2020-10-27 23:42:30,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:30,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388136925] [2020-10-27 23:42:30,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:30,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:30,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:30,968 INFO L87 Difference]: Start difference. First operand 4053 states and 6197 transitions. Second operand 10 states. [2020-10-27 23:42:31,689 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 183 [2020-10-27 23:42:33,099 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:33,898 INFO L93 Difference]: Finished difference Result 5227 states and 7965 transitions. [2020-10-27 23:42:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:42:33,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 23:42:33,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:33,909 INFO L225 Difference]: With dead ends: 5227 [2020-10-27 23:42:33,909 INFO L226 Difference]: Without dead ends: 5222 [2020-10-27 23:42:33,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:42:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5222 states. [2020-10-27 23:42:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5222 to 4053. [2020-10-27 23:42:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4053 states. [2020-10-27 23:42:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6197 transitions. [2020-10-27 23:42:34,291 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6197 transitions. Word has length 53 [2020-10-27 23:42:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:34,291 INFO L481 AbstractCegarLoop]: Abstraction has 4053 states and 6197 transitions. [2020-10-27 23:42:34,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6197 transitions. [2020-10-27 23:42:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:34,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:34,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:34,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:42:34,294 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1886222156, now seen corresponding path program 1 times [2020-10-27 23:42:34,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:34,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300852890] [2020-10-27 23:42:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:34,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:42:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:42:39,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:39,685 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:39,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:39,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:39,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:39,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300852890] [2020-10-27 23:42:39,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:39,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:39,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151593214] [2020-10-27 23:42:39,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:39,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:39,714 INFO L87 Difference]: Start difference. First operand 4053 states and 6197 transitions. Second operand 10 states. [2020-10-27 23:42:40,065 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:42:41,726 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:42:42,006 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:43,126 INFO L93 Difference]: Finished difference Result 7613 states and 11583 transitions. [2020-10-27 23:42:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 23:42:43,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 23:42:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:43,144 INFO L225 Difference]: With dead ends: 7613 [2020-10-27 23:42:43,144 INFO L226 Difference]: Without dead ends: 5808 [2020-10-27 23:42:43,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:42:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2020-10-27 23:42:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4053. [2020-10-27 23:42:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4053 states. [2020-10-27 23:42:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6173 transitions. [2020-10-27 23:42:43,619 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6173 transitions. Word has length 53 [2020-10-27 23:42:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:43,620 INFO L481 AbstractCegarLoop]: Abstraction has 4053 states and 6173 transitions. [2020-10-27 23:42:43,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6173 transitions. [2020-10-27 23:42:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:43,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:43,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:43,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:42:43,622 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:43,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1165674538, now seen corresponding path program 1 times [2020-10-27 23:42:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:43,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958089893] [2020-10-27 23:42:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:43,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:48,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:48,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:42:48,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:42:48,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:48,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:48,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:42:48,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:48,938 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:48,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:48,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:48,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:48,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:48,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958089893] [2020-10-27 23:42:48,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:48,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:48,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41322588] [2020-10-27 23:42:48,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:48,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:48,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:48,964 INFO L87 Difference]: Start difference. First operand 4053 states and 6173 transitions. Second operand 6 states. [2020-10-27 23:42:49,285 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:50,574 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:50,899 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:51,932 INFO L93 Difference]: Finished difference Result 4444 states and 6742 transitions. [2020-10-27 23:42:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:42:51,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:42:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:51,942 INFO L225 Difference]: With dead ends: 4444 [2020-10-27 23:42:51,942 INFO L226 Difference]: Without dead ends: 4434 [2020-10-27 23:42:51,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:42:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2020-10-27 23:42:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4051. [2020-10-27 23:42:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4051 states. [2020-10-27 23:42:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4051 states to 4051 states and 6169 transitions. [2020-10-27 23:42:52,335 INFO L78 Accepts]: Start accepts. Automaton has 4051 states and 6169 transitions. Word has length 53 [2020-10-27 23:42:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:52,335 INFO L481 AbstractCegarLoop]: Abstraction has 4051 states and 6169 transitions. [2020-10-27 23:42:52,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4051 states and 6169 transitions. [2020-10-27 23:42:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:52,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:52,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:42:52,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:42:52,338 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 350207193, now seen corresponding path program 1 times [2020-10-27 23:42:52,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:52,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447168198] [2020-10-27 23:42:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:42:57,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:57,775 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:57,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:57,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:57,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:57,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:57,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:57,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:57,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:57,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:57,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:57,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447168198] [2020-10-27 23:42:57,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:57,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:57,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752360031] [2020-10-27 23:42:57,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:57,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:57,804 INFO L87 Difference]: Start difference. First operand 4051 states and 6169 transitions. Second operand 10 states. [2020-10-27 23:42:58,147 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:42:59,618 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:01,121 INFO L93 Difference]: Finished difference Result 10011 states and 15360 transitions. [2020-10-27 23:43:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:43:01,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-27 23:43:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:01,139 INFO L225 Difference]: With dead ends: 10011 [2020-10-27 23:43:01,139 INFO L226 Difference]: Without dead ends: 10004 [2020-10-27 23:43:01,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:43:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10004 states. [2020-10-27 23:43:01,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10004 to 4051. [2020-10-27 23:43:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4051 states. [2020-10-27 23:43:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4051 states to 4051 states and 6168 transitions. [2020-10-27 23:43:01,632 INFO L78 Accepts]: Start accepts. Automaton has 4051 states and 6168 transitions. Word has length 53 [2020-10-27 23:43:01,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:01,632 INFO L481 AbstractCegarLoop]: Abstraction has 4051 states and 6168 transitions. [2020-10-27 23:43:01,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:01,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4051 states and 6168 transitions. [2020-10-27 23:43:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:43:01,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:01,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:01,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:43:01,634 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:01,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:01,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1625177533, now seen corresponding path program 1 times [2020-10-27 23:43:01,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:01,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965496536] [2020-10-27 23:43:01,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:01,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:01,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:06,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:43:06,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:43:06,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:43:06,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:43:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:06,931 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:06,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:06,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:06,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965496536] [2020-10-27 23:43:06,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:06,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:06,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894782501] [2020-10-27 23:43:06,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:06,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:06,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:06,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:06,955 INFO L87 Difference]: Start difference. First operand 4051 states and 6168 transitions. Second operand 6 states. [2020-10-27 23:43:07,228 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:08,368 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:09,233 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:09,512 INFO L93 Difference]: Finished difference Result 4729 states and 7204 transitions. [2020-10-27 23:43:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:43:09,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:43:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:09,519 INFO L225 Difference]: With dead ends: 4729 [2020-10-27 23:43:09,520 INFO L226 Difference]: Without dead ends: 4713 [2020-10-27 23:43:09,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:43:09,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2020-10-27 23:43:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4049. [2020-10-27 23:43:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4049 states. [2020-10-27 23:43:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 6165 transitions. [2020-10-27 23:43:09,911 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 6165 transitions. Word has length 53 [2020-10-27 23:43:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:09,912 INFO L481 AbstractCegarLoop]: Abstraction has 4049 states and 6165 transitions. [2020-10-27 23:43:09,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 6165 transitions. [2020-10-27 23:43:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:09,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:09,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:09,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:43:09,914 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:09,914 INFO L82 PathProgramCache]: Analyzing trace with hash -191054730, now seen corresponding path program 1 times [2020-10-27 23:43:09,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:09,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348431453] [2020-10-27 23:43:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:09,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:10,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:14,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:14,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:43:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:43:14,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:14,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:43:14,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:15,297 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:15,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:15,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:15,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348431453] [2020-10-27 23:43:15,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:15,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:15,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701775933] [2020-10-27 23:43:15,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:15,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:15,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:15,321 INFO L87 Difference]: Start difference. First operand 4049 states and 6165 transitions. Second operand 10 states. [2020-10-27 23:43:15,662 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:43:17,241 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:43:18,988 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:19,349 INFO L93 Difference]: Finished difference Result 6737 states and 10151 transitions. [2020-10-27 23:43:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 23:43:19,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:43:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:19,357 INFO L225 Difference]: With dead ends: 6737 [2020-10-27 23:43:19,357 INFO L226 Difference]: Without dead ends: 6723 [2020-10-27 23:43:19,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:43:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6723 states. [2020-10-27 23:43:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6723 to 4049. [2020-10-27 23:43:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4049 states. [2020-10-27 23:43:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 6164 transitions. [2020-10-27 23:43:19,729 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 6164 transitions. Word has length 54 [2020-10-27 23:43:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:19,730 INFO L481 AbstractCegarLoop]: Abstraction has 4049 states and 6164 transitions. [2020-10-27 23:43:19,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 6164 transitions. [2020-10-27 23:43:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:19,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:19,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:19,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:43:19,731 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:19,732 INFO L82 PathProgramCache]: Analyzing trace with hash 708226818, now seen corresponding path program 1 times [2020-10-27 23:43:19,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:19,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806552956] [2020-10-27 23:43:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:19,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:19,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:19,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:19,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:24,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:24,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:43:24,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:25,117 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:25,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:25,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:25,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:25,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:25,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:25,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:25,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:25,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:25,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:25,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:25,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806552956] [2020-10-27 23:43:25,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:25,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:25,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908259503] [2020-10-27 23:43:25,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:25,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:25,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:25,147 INFO L87 Difference]: Start difference. First operand 4049 states and 6164 transitions. Second operand 10 states. [2020-10-27 23:43:25,476 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 23:43:27,323 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:29,447 INFO L93 Difference]: Finished difference Result 11691 states and 17882 transitions. [2020-10-27 23:43:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 23:43:29,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:43:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:29,514 INFO L225 Difference]: With dead ends: 11691 [2020-10-27 23:43:29,514 INFO L226 Difference]: Without dead ends: 11684 [2020-10-27 23:43:29,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 23:43:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2020-10-27 23:43:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 4049. [2020-10-27 23:43:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4049 states. [2020-10-27 23:43:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 6162 transitions. [2020-10-27 23:43:29,869 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 6162 transitions. Word has length 54 [2020-10-27 23:43:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:29,870 INFO L481 AbstractCegarLoop]: Abstraction has 4049 states and 6162 transitions. [2020-10-27 23:43:29,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 6162 transitions. [2020-10-27 23:43:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:29,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:29,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:29,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:43:29,872 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1747397036, now seen corresponding path program 1 times [2020-10-27 23:43:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053226753] [2020-10-27 23:43:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:29,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:30,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:30,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:43:30,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-27 23:43:30,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:30,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:43:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:43:30,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 23:43:30,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:30,791 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:30,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:30,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:30,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:30,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:30,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:43:30,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:30,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:30,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:30,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053226753] [2020-10-27 23:43:30,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:30,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:43:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853987936] [2020-10-27 23:43:30,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:43:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:43:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:43:30,819 INFO L87 Difference]: Start difference. First operand 4049 states and 6162 transitions. Second operand 9 states. [2020-10-27 23:43:31,149 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:43:32,440 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:43:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:33,352 INFO L93 Difference]: Finished difference Result 5590 states and 8554 transitions. [2020-10-27 23:43:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:33,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 23:43:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:33,360 INFO L225 Difference]: With dead ends: 5590 [2020-10-27 23:43:33,360 INFO L226 Difference]: Without dead ends: 5570 [2020-10-27 23:43:33,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:43:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2020-10-27 23:43:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 4031. [2020-10-27 23:43:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4031 states. [2020-10-27 23:43:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4031 states to 4031 states and 6138 transitions. [2020-10-27 23:43:33,726 INFO L78 Accepts]: Start accepts. Automaton has 4031 states and 6138 transitions. Word has length 55 [2020-10-27 23:43:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:33,726 INFO L481 AbstractCegarLoop]: Abstraction has 4031 states and 6138 transitions. [2020-10-27 23:43:33,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:43:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4031 states and 6138 transitions. [2020-10-27 23:43:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:33,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:33,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:33,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:43:33,727 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:33,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1834091247, now seen corresponding path program 1 times [2020-10-27 23:43:33,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:33,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112006268] [2020-10-27 23:43:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:33,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:35,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1957 [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:43:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:36,109 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:36,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:36,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:36,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:36,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:36,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112006268] [2020-10-27 23:43:36,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:36,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:36,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363571356] [2020-10-27 23:43:36,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:36,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:36,134 INFO L87 Difference]: Start difference. First operand 4031 states and 6138 transitions. Second operand 11 states. [2020-10-27 23:43:36,459 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:43:37,748 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:43:38,068 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:38,779 INFO L93 Difference]: Finished difference Result 5812 states and 8874 transitions. [2020-10-27 23:43:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:38,779 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:43:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:38,785 INFO L225 Difference]: With dead ends: 5812 [2020-10-27 23:43:38,785 INFO L226 Difference]: Without dead ends: 5159 [2020-10-27 23:43:38,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:43:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5159 states. [2020-10-27 23:43:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5159 to 4030. [2020-10-27 23:43:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4030 states. [2020-10-27 23:43:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 6135 transitions. [2020-10-27 23:43:39,216 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 6135 transitions. Word has length 55 [2020-10-27 23:43:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:39,216 INFO L481 AbstractCegarLoop]: Abstraction has 4030 states and 6135 transitions. [2020-10-27 23:43:39,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 6135 transitions. [2020-10-27 23:43:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:39,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:39,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:39,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:43:39,218 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1158421159, now seen corresponding path program 1 times [2020-10-27 23:43:39,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:39,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848802318] [2020-10-27 23:43:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:39,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:39,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:39,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:39,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:43:39,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-27 23:43:39,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:39,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:43:39,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:43:39,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:43:39,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:40,236 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:40,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:40,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:40,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:40,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:40,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:43:40,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:40,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848802318] [2020-10-27 23:43:40,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:40,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:43:40,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872345998] [2020-10-27 23:43:40,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:43:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:40,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:43:40,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:43:40,275 INFO L87 Difference]: Start difference. First operand 4030 states and 6135 transitions. Second operand 8 states. [2020-10-27 23:43:40,585 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 23:43:42,231 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 184 [2020-10-27 23:43:42,595 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-27 23:43:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:43,623 INFO L93 Difference]: Finished difference Result 5339 states and 8165 transitions. [2020-10-27 23:43:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:43:43,624 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 23:43:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:43,630 INFO L225 Difference]: With dead ends: 5339 [2020-10-27 23:43:43,631 INFO L226 Difference]: Without dead ends: 5323 [2020-10-27 23:43:43,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:43:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2020-10-27 23:43:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 4022. [2020-10-27 23:43:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2020-10-27 23:43:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 6125 transitions. [2020-10-27 23:43:44,109 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 6125 transitions. Word has length 55 [2020-10-27 23:43:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:44,109 INFO L481 AbstractCegarLoop]: Abstraction has 4022 states and 6125 transitions. [2020-10-27 23:43:44,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:43:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 6125 transitions. [2020-10-27 23:43:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:44,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:44,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:44,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:43:44,110 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1591342540, now seen corresponding path program 1 times [2020-10-27 23:43:44,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:44,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602268170] [2020-10-27 23:43:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:44,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 23:43:44,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:45,341 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:45,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:45,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:45,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:45,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:45,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:45,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:45,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602268170] [2020-10-27 23:43:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:45,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:43:45,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194943078] [2020-10-27 23:43:45,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:43:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:43:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:43:45,369 INFO L87 Difference]: Start difference. First operand 4022 states and 6125 transitions. Second operand 9 states. [2020-10-27 23:43:45,675 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:43:46,941 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 23:43:47,236 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:43:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:48,170 INFO L93 Difference]: Finished difference Result 5910 states and 9037 transitions. [2020-10-27 23:43:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:48,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 23:43:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:48,177 INFO L225 Difference]: With dead ends: 5910 [2020-10-27 23:43:48,178 INFO L226 Difference]: Without dead ends: 5903 [2020-10-27 23:43:48,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 23:43:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5903 states. [2020-10-27 23:43:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5903 to 4017. [2020-10-27 23:43:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4017 states. [2020-10-27 23:43:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 6117 transitions. [2020-10-27 23:43:48,595 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 6117 transitions. Word has length 55 [2020-10-27 23:43:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:48,595 INFO L481 AbstractCegarLoop]: Abstraction has 4017 states and 6117 transitions. [2020-10-27 23:43:48,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:43:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 6117 transitions. [2020-10-27 23:43:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:43:48,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:48,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:48,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 23:43:48,597 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2128026737, now seen corresponding path program 1 times [2020-10-27 23:43:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:48,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125871212] [2020-10-27 23:43:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:48,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2283 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:43:50,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:51,390 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:51,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:51,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:51,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:51,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:51,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:51,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:43:51,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:51,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:51,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:51,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125871212] [2020-10-27 23:43:51,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:51,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:43:51,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780763874] [2020-10-27 23:43:51,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:43:51,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:51,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:43:51,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:43:51,426 INFO L87 Difference]: Start difference. First operand 4017 states and 6117 transitions. Second operand 12 states. [2020-10-27 23:43:51,769 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 23:43:53,306 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:43:53,671 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:54,783 INFO L93 Difference]: Finished difference Result 6241 states and 9411 transitions. [2020-10-27 23:43:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:43:54,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-27 23:43:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:54,790 INFO L225 Difference]: With dead ends: 6241 [2020-10-27 23:43:54,790 INFO L226 Difference]: Without dead ends: 6233 [2020-10-27 23:43:54,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:43:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6233 states. [2020-10-27 23:43:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6233 to 4021. [2020-10-27 23:43:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4021 states. [2020-10-27 23:43:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 6121 transitions. [2020-10-27 23:43:55,224 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 6121 transitions. Word has length 56 [2020-10-27 23:43:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:55,224 INFO L481 AbstractCegarLoop]: Abstraction has 4021 states and 6121 transitions. [2020-10-27 23:43:55,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:43:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 6121 transitions. [2020-10-27 23:43:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:43:55,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:55,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:43:55,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 23:43:55,226 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1755683664, now seen corresponding path program 1 times [2020-10-27 23:43:55,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:55,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236071171] [2020-10-27 23:43:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:55,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:55,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:55,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:56,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:59,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:43:59,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:43:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4463 [2020-10-27 23:43:59,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:43:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:43:59,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:00,133 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:00,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:00,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:00,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:44:00,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:00,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:00,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236071171] [2020-10-27 23:44:00,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:00,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:00,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469348638] [2020-10-27 23:44:00,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:00,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:00,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:00,227 INFO L87 Difference]: Start difference. First operand 4021 states and 6121 transitions. Second operand 10 states. [2020-10-27 23:44:00,515 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:44:01,632 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:44:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:02,308 INFO L93 Difference]: Finished difference Result 4911 states and 7494 transitions. [2020-10-27 23:44:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:02,310 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-27 23:44:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:02,317 INFO L225 Difference]: With dead ends: 4911 [2020-10-27 23:44:02,317 INFO L226 Difference]: Without dead ends: 4900 [2020-10-27 23:44:02,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:44:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2020-10-27 23:44:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4012. [2020-10-27 23:44:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4012 states. [2020-10-27 23:44:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 6111 transitions. [2020-10-27 23:44:02,777 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 6111 transitions. Word has length 56 [2020-10-27 23:44:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:02,777 INFO L481 AbstractCegarLoop]: Abstraction has 4012 states and 6111 transitions. [2020-10-27 23:44:02,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 6111 transitions. [2020-10-27 23:44:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 23:44:02,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:02,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:02,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 23:44:02,779 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -608292584, now seen corresponding path program 1 times [2020-10-27 23:44:02,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:02,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454830373] [2020-10-27 23:44:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:05,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2264 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:44:05,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:05,408 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:05,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:05,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:05,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:05,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:05,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454830373] [2020-10-27 23:44:05,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:05,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:44:05,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438350235] [2020-10-27 23:44:05,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:44:05,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:05,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:44:05,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:44:05,433 INFO L87 Difference]: Start difference. First operand 4012 states and 6111 transitions. Second operand 8 states. [2020-10-27 23:44:05,731 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:44:07,443 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:44:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:07,859 INFO L93 Difference]: Finished difference Result 5308 states and 8128 transitions. [2020-10-27 23:44:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 23:44:07,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 23:44:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:07,867 INFO L225 Difference]: With dead ends: 5308 [2020-10-27 23:44:07,867 INFO L226 Difference]: Without dead ends: 5285 [2020-10-27 23:44:07,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:44:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5285 states. [2020-10-27 23:44:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5285 to 3991. [2020-10-27 23:44:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3991 states. [2020-10-27 23:44:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 6086 transitions. [2020-10-27 23:44:08,306 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 6086 transitions. Word has length 57 [2020-10-27 23:44:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:08,306 INFO L481 AbstractCegarLoop]: Abstraction has 3991 states and 6086 transitions. [2020-10-27 23:44:08,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:44:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 6086 transitions. [2020-10-27 23:44:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 23:44:08,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:08,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:08,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 23:44:08,312 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2119134302, now seen corresponding path program 1 times [2020-10-27 23:44:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:08,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989870699] [2020-10-27 23:44:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:08,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:10,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:10,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:10,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:11,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:13,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 23:44:13,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:44:13,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:44:13,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:13,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:44:13,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 23:44:13,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 23:44:13,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:13,614 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:13,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:13,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:13,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:13,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:13,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989870699] [2020-10-27 23:44:13,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:44:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354720708] [2020-10-27 23:44:13,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:44:13,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:44:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:44:13,649 INFO L87 Difference]: Start difference. First operand 3991 states and 6086 transitions. Second operand 4 states. [2020-10-27 23:44:13,931 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:44:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:15,686 INFO L93 Difference]: Finished difference Result 10847 states and 16774 transitions. [2020-10-27 23:44:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:44:15,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 23:44:15,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:15,697 INFO L225 Difference]: With dead ends: 10847 [2020-10-27 23:44:15,697 INFO L226 Difference]: Without dead ends: 7235 [2020-10-27 23:44:15,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7235 states. [2020-10-27 23:44:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7235 to 6888. [2020-10-27 23:44:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6888 states. [2020-10-27 23:44:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6888 states to 6888 states and 10534 transitions. [2020-10-27 23:44:16,627 INFO L78 Accepts]: Start accepts. Automaton has 6888 states and 10534 transitions. Word has length 70 [2020-10-27 23:44:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:16,627 INFO L481 AbstractCegarLoop]: Abstraction has 6888 states and 10534 transitions. [2020-10-27 23:44:16,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:44:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6888 states and 10534 transitions. [2020-10-27 23:44:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 23:44:16,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:16,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:16,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 23:44:16,632 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 780342638, now seen corresponding path program 1 times [2020-10-27 23:44:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:16,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132969159] [2020-10-27 23:44:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:21,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 23:44:21,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 23:44:21,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:44:21,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:21,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:44:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 23:44:21,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:44:21,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:21,926 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:21,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:21,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:21,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:21,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:21,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132969159] [2020-10-27 23:44:21,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:21,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:44:21,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480282170] [2020-10-27 23:44:21,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:44:21,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:44:21,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:44:21,952 INFO L87 Difference]: Start difference. First operand 6888 states and 10534 transitions. Second operand 4 states. [2020-10-27 23:44:22,232 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:44:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:24,651 INFO L93 Difference]: Finished difference Result 19906 states and 30762 transitions. [2020-10-27 23:44:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:44:24,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 23:44:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:24,671 INFO L225 Difference]: With dead ends: 19906 [2020-10-27 23:44:24,671 INFO L226 Difference]: Without dead ends: 13397 [2020-10-27 23:44:24,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13397 states. [2020-10-27 23:44:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13397 to 13394. [2020-10-27 23:44:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13394 states. [2020-10-27 23:44:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13394 states to 13394 states and 20278 transitions. [2020-10-27 23:44:26,508 INFO L78 Accepts]: Start accepts. Automaton has 13394 states and 20278 transitions. Word has length 71 [2020-10-27 23:44:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:26,508 INFO L481 AbstractCegarLoop]: Abstraction has 13394 states and 20278 transitions. [2020-10-27 23:44:26,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:44:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13394 states and 20278 transitions. [2020-10-27 23:44:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 23:44:26,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:26,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:44:26,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 23:44:26,514 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1155381282, now seen corresponding path program 1 times [2020-10-27 23:44:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:26,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789113163] [2020-10-27 23:44:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:26,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:30,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:44:31,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 23:44:31,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:44:31,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:31,802 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:31,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:31,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:31,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:31,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789113163] [2020-10-27 23:44:31,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:31,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:44:31,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531129325] [2020-10-27 23:44:31,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:44:31,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:44:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:44:31,830 INFO L87 Difference]: Start difference. First operand 13394 states and 20278 transitions. Second operand 4 states. [2020-10-27 23:44:32,117 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:44:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:36,177 INFO L93 Difference]: Finished difference Result 37032 states and 55762 transitions. [2020-10-27 23:44:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:44:36,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-27 23:44:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:36,212 INFO L225 Difference]: With dead ends: 37032 [2020-10-27 23:44:36,212 INFO L226 Difference]: Without dead ends: 24017 [2020-10-27 23:44:36,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:44:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24017 states.