/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:12:05,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:12:05,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:12:05,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:12:05,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:12:05,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:12:05,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:12:05,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:12:05,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:12:05,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:12:05,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:12:05,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:12:05,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:12:05,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:12:05,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:12:05,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:12:05,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:12:05,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:12:05,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:12:05,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:12:05,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:12:05,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:12:05,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:12:05,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:12:05,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:12:05,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:12:05,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:12:05,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:12:05,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:12:05,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:12:05,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:12:05,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:12:05,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:12:05,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:12:05,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:12:05,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:12:05,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:12:05,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:12:05,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:12:05,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:12:05,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:12:05,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:12:05,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:12:05,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:12:05,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:12:05,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:12:05,315 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:12:05,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:12:05,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:12:05,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:12:05,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:12:05,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:12:05,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:12:05,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:12:05,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:12:05,319 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:12:05,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:12:05,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:12:05,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:12:05,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:12:05,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:12:05,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:12:05,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:12:05,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:12:05,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:12:05,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:12:05,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:12:05,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:12:05,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:12:05,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:12:05,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:12:05,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:12:05,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:12:05,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:12:05,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:12:05,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:12:05,828 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:12:05,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:12:05,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43623182c/ca30bbe3cc814ac9a9ffe40d58bf6535/FLAG9849dce77 [2020-10-28 18:12:06,608 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:12:06,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:12:06,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43623182c/ca30bbe3cc814ac9a9ffe40d58bf6535/FLAG9849dce77 [2020-10-28 18:12:06,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43623182c/ca30bbe3cc814ac9a9ffe40d58bf6535 [2020-10-28 18:12:06,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:12:06,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:12:06,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:12:06,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:12:06,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:12:06,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:12:06" (1/1) ... [2020-10-28 18:12:06,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10873ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:06, skipping insertion in model container [2020-10-28 18:12:06,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:12:06" (1/1) ... [2020-10-28 18:12:06,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:12:06,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:12:07,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:12:07,664 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:12:07,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:12:08,009 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:12:08,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08 WrapperNode [2020-10-28 18:12:08,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:12:08,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:12:08,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:12:08,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:12:08,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... [2020-10-28 18:12:08,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:12:08,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:12:08,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:12:08,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:12:08,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:12:08,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:12:08,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:12:08,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:12:08,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:12:08,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:12:08,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:12:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:12:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:12:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:12:08,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:12:08,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:12:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:12:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:12:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:12:08,308 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:12:08,309 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:12:08,309 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:12:08,310 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:12:08,310 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:12:08,310 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:12:08,310 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:12:08,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:12:08,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:12:08,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:12:08,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:12:08,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:12:08,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:12:08,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:12:10,495 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:12:10,495 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:12:10,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:12:10 BoogieIcfgContainer [2020-10-28 18:12:10,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:12:10,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:12:10,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:12:10,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:12:10,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:12:06" (1/3) ... [2020-10-28 18:12:10,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd79b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:12:10, skipping insertion in model container [2020-10-28 18:12:10,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:12:08" (2/3) ... [2020-10-28 18:12:10,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd79b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:12:10, skipping insertion in model container [2020-10-28 18:12:10,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:12:10" (3/3) ... [2020-10-28 18:12:10,508 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 18:12:10,522 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:12:10,529 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:12:10,544 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:12:10,577 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:12:10,577 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:12:10,578 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:12:10,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:12:10,578 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:12:10,578 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:12:10,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:12:10,579 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:12:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states. [2020-10-28 18:12:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 18:12:10,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:10,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:10,644 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:10,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1029016139, now seen corresponding path program 1 times [2020-10-28 18:12:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:10,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055659206] [2020-10-28 18:12:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:11,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:12,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:12,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:12,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:13,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:14,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:16,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:16,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 18:12:16,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:12:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 18:12:16,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:16,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:12:16,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 18:12:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 18:12:16,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:12:17,003 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:12:17,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:17,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:17,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:17,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:17,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:12:17,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:17,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:12:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:17,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055659206] [2020-10-28 18:12:17,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:17,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:12:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756426207] [2020-10-28 18:12:17,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:12:17,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:12:17,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:12:17,149 INFO L87 Difference]: Start difference. First operand 386 states. Second operand 4 states. [2020-10-28 18:12:17,685 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:12:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:20,667 INFO L93 Difference]: Finished difference Result 707 states and 1261 transitions. [2020-10-28 18:12:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:12:20,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-10-28 18:12:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:20,690 INFO L225 Difference]: With dead ends: 707 [2020-10-28 18:12:20,690 INFO L226 Difference]: Without dead ends: 569 [2020-10-28 18:12:20,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2020-10-28 18:12:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 566. [2020-10-28 18:12:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-28 18:12:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 832 transitions. [2020-10-28 18:12:20,806 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 832 transitions. Word has length 143 [2020-10-28 18:12:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:20,807 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 832 transitions. [2020-10-28 18:12:20,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:12:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 832 transitions. [2020-10-28 18:12:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 18:12:20,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:20,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:20,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:12:20,814 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:20,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1018519074, now seen corresponding path program 1 times [2020-10-28 18:12:20,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:20,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856728762] [2020-10-28 18:12:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:20,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:22,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:22,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:22,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:25,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:25,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:25,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-28 18:12:25,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:12:25,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:12:25,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:25,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 18:12:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:12:26,553 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:12:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:26,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:26,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:26,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:26,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:26,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:12:26,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:26,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:26,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:26,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:26,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:12:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856728762] [2020-10-28 18:12:26,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:26,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115252775] [2020-10-28 18:12:26,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:26,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:26,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:26,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:26,683 INFO L87 Difference]: Start difference. First operand 566 states and 832 transitions. Second operand 5 states. [2020-10-28 18:12:29,189 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:12:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:30,500 INFO L93 Difference]: Finished difference Result 1634 states and 2395 transitions. [2020-10-28 18:12:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:30,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-28 18:12:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:30,516 INFO L225 Difference]: With dead ends: 1634 [2020-10-28 18:12:30,516 INFO L226 Difference]: Without dead ends: 1089 [2020-10-28 18:12:30,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:12:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-10-28 18:12:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1054. [2020-10-28 18:12:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2020-10-28 18:12:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1541 transitions. [2020-10-28 18:12:30,645 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1541 transitions. Word has length 143 [2020-10-28 18:12:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:30,645 INFO L481 AbstractCegarLoop]: Abstraction has 1054 states and 1541 transitions. [2020-10-28 18:12:30,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1541 transitions. [2020-10-28 18:12:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-28 18:12:30,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:30,649 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:30,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:12:30,650 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:30,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:30,650 INFO L82 PathProgramCache]: Analyzing trace with hash 54351419, now seen corresponding path program 1 times [2020-10-28 18:12:30,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:30,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862975217] [2020-10-28 18:12:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:30,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:30,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:31,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:35,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:35,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-28 18:12:35,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:12:35,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:12:35,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:35,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:35,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:35,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 18:12:35,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:12:36,165 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:12:36,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:36,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:36,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:36,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:36,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:12:36,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:36,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:36,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:36,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:36,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:36,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:12:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:36,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862975217] [2020-10-28 18:12:36,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:36,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236842374] [2020-10-28 18:12:36,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:36,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:36,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:36,300 INFO L87 Difference]: Start difference. First operand 1054 states and 1541 transitions. Second operand 5 states. [2020-10-28 18:12:38,954 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:12:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:40,261 INFO L93 Difference]: Finished difference Result 3092 states and 4508 transitions. [2020-10-28 18:12:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:40,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 144 [2020-10-28 18:12:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:40,277 INFO L225 Difference]: With dead ends: 3092 [2020-10-28 18:12:40,277 INFO L226 Difference]: Without dead ends: 2049 [2020-10-28 18:12:40,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:12:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2020-10-28 18:12:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2022. [2020-10-28 18:12:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2022 states. [2020-10-28 18:12:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 2923 transitions. [2020-10-28 18:12:40,400 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 2923 transitions. Word has length 144 [2020-10-28 18:12:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:40,401 INFO L481 AbstractCegarLoop]: Abstraction has 2022 states and 2923 transitions. [2020-10-28 18:12:40,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 2923 transitions. [2020-10-28 18:12:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 18:12:40,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:40,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:40,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:12:40,406 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:40,406 INFO L82 PathProgramCache]: Analyzing trace with hash -500049343, now seen corresponding path program 1 times [2020-10-28 18:12:40,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:40,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860660756] [2020-10-28 18:12:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:40,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:40,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:40,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:40,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:41,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:41,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:44,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:45,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:45,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 18:12:45,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:12:45,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:12:45,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:45,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:45,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:45,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:45,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:12:45,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:12:46,082 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:12:46,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:46,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:46,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:46,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:46,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:46,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:12:46,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:46,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:46,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860660756] [2020-10-28 18:12:46,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:46,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:46,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608493833] [2020-10-28 18:12:46,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:46,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:46,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:46,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:46,242 INFO L87 Difference]: Start difference. First operand 2022 states and 2923 transitions. Second operand 5 states. [2020-10-28 18:12:49,125 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:12:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:12:50,653 INFO L93 Difference]: Finished difference Result 5603 states and 8118 transitions. [2020-10-28 18:12:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:12:50,654 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-28 18:12:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:12:50,674 INFO L225 Difference]: With dead ends: 5603 [2020-10-28 18:12:50,674 INFO L226 Difference]: Without dead ends: 3902 [2020-10-28 18:12:50,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:12:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2020-10-28 18:12:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3861. [2020-10-28 18:12:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3861 states. [2020-10-28 18:12:50,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 5520 transitions. [2020-10-28 18:12:50,904 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 5520 transitions. Word has length 145 [2020-10-28 18:12:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:12:50,905 INFO L481 AbstractCegarLoop]: Abstraction has 3861 states and 5520 transitions. [2020-10-28 18:12:50,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:12:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 5520 transitions. [2020-10-28 18:12:50,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 18:12:50,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:12:50,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:12:50,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:12:50,912 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:12:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:12:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1248396057, now seen corresponding path program 1 times [2020-10-28 18:12:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:12:50,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893053779] [2020-10-28 18:12:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:12:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:50,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:51,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:52,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:52,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:52,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:54,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:54,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:55,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:12:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:12:55,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 18:12:55,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:12:56,580 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:12:56,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:12:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:12:56,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:12:56,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:12:56,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:12:56,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:12:56,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:12:56,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:12:56,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:12:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:12:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:12:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:12:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:12:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:12:56,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893053779] [2020-10-28 18:12:56,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:12:56,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:12:56,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247729829] [2020-10-28 18:12:56,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:12:56,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:12:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:12:56,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:12:56,716 INFO L87 Difference]: Start difference. First operand 3861 states and 5520 transitions. Second operand 5 states. [2020-10-28 18:12:59,552 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:13:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:01,033 INFO L93 Difference]: Finished difference Result 11259 states and 16047 transitions. [2020-10-28 18:13:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:13:01,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-10-28 18:13:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:01,069 INFO L225 Difference]: With dead ends: 11259 [2020-10-28 18:13:01,069 INFO L226 Difference]: Without dead ends: 7460 [2020-10-28 18:13:01,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:13:01,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2020-10-28 18:13:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7419. [2020-10-28 18:13:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7419 states. [2020-10-28 18:13:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 10479 transitions. [2020-10-28 18:13:01,518 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 10479 transitions. Word has length 146 [2020-10-28 18:13:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:01,519 INFO L481 AbstractCegarLoop]: Abstraction has 7419 states and 10479 transitions. [2020-10-28 18:13:01,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 10479 transitions. [2020-10-28 18:13:01,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 18:13:01,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:01,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:01,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:13:01,531 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1860839808, now seen corresponding path program 1 times [2020-10-28 18:13:01,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:01,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798053385] [2020-10-28 18:13:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:01,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:01,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:04,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:04,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:04,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:06,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 18:13:06,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:07,062 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:13:07,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:07,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:07,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:07,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:07,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:13:07,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:07,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:07,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:07,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:07,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:07,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:07,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798053385] [2020-10-28 18:13:07,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:07,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453254830] [2020-10-28 18:13:07,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:07,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:07,163 INFO L87 Difference]: Start difference. First operand 7419 states and 10479 transitions. Second operand 5 states. [2020-10-28 18:13:10,156 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:13:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:11,294 INFO L93 Difference]: Finished difference Result 19366 states and 27365 transitions. [2020-10-28 18:13:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:13:11,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-10-28 18:13:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:11,356 INFO L225 Difference]: With dead ends: 19366 [2020-10-28 18:13:11,356 INFO L226 Difference]: Without dead ends: 12893 [2020-10-28 18:13:11,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:13:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12893 states. [2020-10-28 18:13:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12893 to 12870. [2020-10-28 18:13:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12870 states. [2020-10-28 18:13:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12870 states to 12870 states and 17795 transitions. [2020-10-28 18:13:12,195 INFO L78 Accepts]: Start accepts. Automaton has 12870 states and 17795 transitions. Word has length 147 [2020-10-28 18:13:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:12,196 INFO L481 AbstractCegarLoop]: Abstraction has 12870 states and 17795 transitions. [2020-10-28 18:13:12,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12870 states and 17795 transitions. [2020-10-28 18:13:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-28 18:13:12,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:12,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:12,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:13:12,216 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 541536090, now seen corresponding path program 1 times [2020-10-28 18:13:12,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:12,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328161841] [2020-10-28 18:13:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:12,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:12,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:12,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:12,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:12,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:17,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:17,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-28 18:13:17,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:13:17,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:13:17,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:17,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:13:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 18:13:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:17,715 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:13:17,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:17,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:17,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:17,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:17,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:17,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328161841] [2020-10-28 18:13:17,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:17,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:17,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643556600] [2020-10-28 18:13:17,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:17,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:17,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:17,771 INFO L87 Difference]: Start difference. First operand 12870 states and 17795 transitions. Second operand 5 states. [2020-10-28 18:13:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:20,143 INFO L93 Difference]: Finished difference Result 23400 states and 32447 transitions. [2020-10-28 18:13:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:13:20,144 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-28 18:13:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:20,167 INFO L225 Difference]: With dead ends: 23400 [2020-10-28 18:13:20,167 INFO L226 Difference]: Without dead ends: 10947 [2020-10-28 18:13:20,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2020-10-28 18:13:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 10947. [2020-10-28 18:13:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10947 states. [2020-10-28 18:13:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 15152 transitions. [2020-10-28 18:13:20,716 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 15152 transitions. Word has length 148 [2020-10-28 18:13:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:20,716 INFO L481 AbstractCegarLoop]: Abstraction has 10947 states and 15152 transitions. [2020-10-28 18:13:20,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 15152 transitions. [2020-10-28 18:13:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 18:13:20,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:20,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:20,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:13:20,743 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:20,743 INFO L82 PathProgramCache]: Analyzing trace with hash 675713973, now seen corresponding path program 1 times [2020-10-28 18:13:20,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:20,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717216621] [2020-10-28 18:13:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:20,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:21,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:21,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:25,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:25,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 18:13:25,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:13:25,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 18:13:25,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:25,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:13:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:13:25,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 18:13:25,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:26,288 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:13:26,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:26,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:26,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:26,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:26,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:13:26,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:26,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:26,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:13:26,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:26,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:13:26,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:26,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717216621] [2020-10-28 18:13:26,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:26,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:26,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098709823] [2020-10-28 18:13:26,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:13:26,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:26,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:13:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:13:26,385 INFO L87 Difference]: Start difference. First operand 10947 states and 15152 transitions. Second operand 6 states. [2020-10-28 18:13:26,858 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-28 18:13:29,293 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:13:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:30,529 INFO L93 Difference]: Finished difference Result 24301 states and 34711 transitions. [2020-10-28 18:13:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:13:30,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2020-10-28 18:13:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:30,567 INFO L225 Difference]: With dead ends: 24301 [2020-10-28 18:13:30,567 INFO L226 Difference]: Without dead ends: 19887 [2020-10-28 18:13:30,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:13:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19887 states. [2020-10-28 18:13:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19887 to 19879. [2020-10-28 18:13:31,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19879 states. [2020-10-28 18:13:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19879 states to 19879 states and 27600 transitions. [2020-10-28 18:13:31,794 INFO L78 Accepts]: Start accepts. Automaton has 19879 states and 27600 transitions. Word has length 152 [2020-10-28 18:13:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:31,794 INFO L481 AbstractCegarLoop]: Abstraction has 19879 states and 27600 transitions. [2020-10-28 18:13:31,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:13:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 19879 states and 27600 transitions. [2020-10-28 18:13:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 18:13:31,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:31,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:31,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:13:31,822 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2018520055, now seen corresponding path program 1 times [2020-10-28 18:13:31,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:31,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71318577] [2020-10-28 18:13:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:31,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:31,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:32,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:32,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:32,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:32,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:34,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:36,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:36,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 18:13:36,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:13:36,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:13:36,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:36,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:36,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:13:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:13:36,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 18:13:36,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:37,312 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:13:37,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:37,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:37,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:37,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71318577] [2020-10-28 18:13:37,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:37,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:13:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266075954] [2020-10-28 18:13:37,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:13:37,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:37,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:13:37,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:13:37,357 INFO L87 Difference]: Start difference. First operand 19879 states and 27600 transitions. Second operand 4 states. [2020-10-28 18:13:37,799 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:13:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:41,536 INFO L93 Difference]: Finished difference Result 35437 states and 51636 transitions. [2020-10-28 18:13:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:13:41,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-10-28 18:13:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:41,596 INFO L225 Difference]: With dead ends: 35437 [2020-10-28 18:13:41,596 INFO L226 Difference]: Without dead ends: 24933 [2020-10-28 18:13:41,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24933 states. [2020-10-28 18:13:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24933 to 24906. [2020-10-28 18:13:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24906 states. [2020-10-28 18:13:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24906 states to 24906 states and 35363 transitions. [2020-10-28 18:13:43,453 INFO L78 Accepts]: Start accepts. Automaton has 24906 states and 35363 transitions. Word has length 152 [2020-10-28 18:13:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:43,454 INFO L481 AbstractCegarLoop]: Abstraction has 24906 states and 35363 transitions. [2020-10-28 18:13:43,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:13:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24906 states and 35363 transitions. [2020-10-28 18:13:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-28 18:13:43,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:43,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:43,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:13:43,478 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:43,479 INFO L82 PathProgramCache]: Analyzing trace with hash 364836346, now seen corresponding path program 1 times [2020-10-28 18:13:43,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:43,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713642756] [2020-10-28 18:13:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:43,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:43,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:47,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:48,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-28 18:13:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:49,022 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:13:49,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:13:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:49,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:13:49,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:13:49,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:13:49,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:13:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:13:49,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713642756] [2020-10-28 18:13:49,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:13:49,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:13:49,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614034088] [2020-10-28 18:13:49,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:13:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:13:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:13:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:13:49,111 INFO L87 Difference]: Start difference. First operand 24906 states and 35363 transitions. Second operand 5 states. [2020-10-28 18:13:52,485 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-28 18:13:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:13:55,202 INFO L93 Difference]: Finished difference Result 64839 states and 92031 transitions. [2020-10-28 18:13:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:13:55,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-28 18:13:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:13:55,272 INFO L225 Difference]: With dead ends: 64839 [2020-10-28 18:13:55,272 INFO L226 Difference]: Without dead ends: 40771 [2020-10-28 18:13:55,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:13:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40771 states. [2020-10-28 18:13:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40771 to 40725. [2020-10-28 18:13:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40725 states. [2020-10-28 18:13:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40725 states to 40725 states and 57129 transitions. [2020-10-28 18:13:58,475 INFO L78 Accepts]: Start accepts. Automaton has 40725 states and 57129 transitions. Word has length 152 [2020-10-28 18:13:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:13:58,475 INFO L481 AbstractCegarLoop]: Abstraction has 40725 states and 57129 transitions. [2020-10-28 18:13:58,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:13:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 40725 states and 57129 transitions. [2020-10-28 18:13:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-28 18:13:58,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:13:58,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:13:58,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:13:58,503 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:13:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:13:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1167513025, now seen corresponding path program 1 times [2020-10-28 18:13:58,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:13:58,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375797303] [2020-10-28 18:13:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:13:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:13:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:58,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:58,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:58,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:13:58,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:01,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:01,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:03,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:03,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 18:14:03,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:04,061 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:14:04,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:04,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:04,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:04,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:04,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:14:04,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:04,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:04,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:04,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:04,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:04,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:04,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375797303] [2020-10-28 18:14:04,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:04,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:04,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894063836] [2020-10-28 18:14:04,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:04,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:04,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:04,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:04,124 INFO L87 Difference]: Start difference. First operand 40725 states and 57129 transitions. Second operand 5 states. [2020-10-28 18:14:04,561 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-28 18:14:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:10,958 INFO L93 Difference]: Finished difference Result 73338 states and 102837 transitions. [2020-10-28 18:14:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:14:10,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-28 18:14:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:11,025 INFO L225 Difference]: With dead ends: 73338 [2020-10-28 18:14:11,025 INFO L226 Difference]: Without dead ends: 40752 [2020-10-28 18:14:11,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:14:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40752 states. [2020-10-28 18:14:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40752 to 40725. [2020-10-28 18:14:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40725 states. [2020-10-28 18:14:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40725 states to 40725 states and 56934 transitions. [2020-10-28 18:14:14,290 INFO L78 Accepts]: Start accepts. Automaton has 40725 states and 56934 transitions. Word has length 153 [2020-10-28 18:14:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:14,290 INFO L481 AbstractCegarLoop]: Abstraction has 40725 states and 56934 transitions. [2020-10-28 18:14:14,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 40725 states and 56934 transitions. [2020-10-28 18:14:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 18:14:14,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:14,315 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:14,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:14:14,316 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash -577862060, now seen corresponding path program 1 times [2020-10-28 18:14:14,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:14,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81123306] [2020-10-28 18:14:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:14,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:19,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:19,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-28 18:14:19,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 18:14:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:19,873 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:14:19,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:19,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:19,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:19,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:19,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81123306] [2020-10-28 18:14:19,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:19,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619261331] [2020-10-28 18:14:19,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:19,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:19,917 INFO L87 Difference]: Start difference. First operand 40725 states and 56934 transitions. Second operand 5 states. [2020-10-28 18:14:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:24,146 INFO L93 Difference]: Finished difference Result 73402 states and 102568 transitions. [2020-10-28 18:14:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:14:24,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-28 18:14:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:24,192 INFO L225 Difference]: With dead ends: 73402 [2020-10-28 18:14:24,193 INFO L226 Difference]: Without dead ends: 33076 [2020-10-28 18:14:24,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:14:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33076 states. [2020-10-28 18:14:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33076 to 33076. [2020-10-28 18:14:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33076 states. [2020-10-28 18:14:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33076 states to 33076 states and 46097 transitions. [2020-10-28 18:14:26,693 INFO L78 Accepts]: Start accepts. Automaton has 33076 states and 46097 transitions. Word has length 154 [2020-10-28 18:14:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:26,694 INFO L481 AbstractCegarLoop]: Abstraction has 33076 states and 46097 transitions. [2020-10-28 18:14:26,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 33076 states and 46097 transitions. [2020-10-28 18:14:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 18:14:26,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:26,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:26,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:14:26,711 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1799787177, now seen corresponding path program 1 times [2020-10-28 18:14:26,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:26,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162450799] [2020-10-28 18:14:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:26,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:26,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:26,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:26,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:31,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:31,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-28 18:14:31,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:14:31,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:14:31,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:31,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:31,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:31,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 18:14:31,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:14:31,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:32,263 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:14:32,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:32,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:32,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:32,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:32,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:14:32,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:32,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:32,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:32,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:32,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162450799] [2020-10-28 18:14:32,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:32,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:32,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713120955] [2020-10-28 18:14:32,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:32,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:32,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:32,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:32,334 INFO L87 Difference]: Start difference. First operand 33076 states and 46097 transitions. Second operand 5 states. [2020-10-28 18:14:36,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:36,150 INFO L93 Difference]: Finished difference Result 57830 states and 80601 transitions. [2020-10-28 18:14:36,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:14:36,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-28 18:14:36,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:36,181 INFO L225 Difference]: With dead ends: 57830 [2020-10-28 18:14:36,181 INFO L226 Difference]: Without dead ends: 24814 [2020-10-28 18:14:36,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:14:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24814 states. [2020-10-28 18:14:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24814 to 24814. [2020-10-28 18:14:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24814 states. [2020-10-28 18:14:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24814 states to 24814 states and 34578 transitions. [2020-10-28 18:14:37,864 INFO L78 Accepts]: Start accepts. Automaton has 24814 states and 34578 transitions. Word has length 157 [2020-10-28 18:14:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:37,864 INFO L481 AbstractCegarLoop]: Abstraction has 24814 states and 34578 transitions. [2020-10-28 18:14:37,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 24814 states and 34578 transitions. [2020-10-28 18:14:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 18:14:37,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:37,876 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:37,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:14:37,877 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash 350127749, now seen corresponding path program 1 times [2020-10-28 18:14:37,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:37,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482457532] [2020-10-28 18:14:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:37,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:37,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:38,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:38,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:42,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:42,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 18:14:42,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:14:42,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:14:42,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:42,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 18:14:42,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-28 18:14:42,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:43,402 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:14:43,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:43,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:43,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:43,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:43,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:43,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482457532] [2020-10-28 18:14:43,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:43,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799242768] [2020-10-28 18:14:43,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:43,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:43,455 INFO L87 Difference]: Start difference. First operand 24814 states and 34578 transitions. Second operand 5 states. [2020-10-28 18:14:43,904 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:14:46,801 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-28 18:14:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:14:49,675 INFO L93 Difference]: Finished difference Result 45115 states and 66086 transitions. [2020-10-28 18:14:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:14:49,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-28 18:14:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:14:49,716 INFO L225 Difference]: With dead ends: 45115 [2020-10-28 18:14:49,716 INFO L226 Difference]: Without dead ends: 32023 [2020-10-28 18:14:49,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:14:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32023 states. [2020-10-28 18:14:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32023 to 25889. [2020-10-28 18:14:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25889 states. [2020-10-28 18:14:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25889 states to 25889 states and 35853 transitions. [2020-10-28 18:14:51,790 INFO L78 Accepts]: Start accepts. Automaton has 25889 states and 35853 transitions. Word has length 165 [2020-10-28 18:14:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:14:51,790 INFO L481 AbstractCegarLoop]: Abstraction has 25889 states and 35853 transitions. [2020-10-28 18:14:51,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:14:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 25889 states and 35853 transitions. [2020-10-28 18:14:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 18:14:51,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:14:51,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:14:51,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:14:51,808 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:14:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:14:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1086630511, now seen corresponding path program 1 times [2020-10-28 18:14:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:14:51,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346834319] [2020-10-28 18:14:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:14:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:51,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:52,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:52,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:55,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:56,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:14:56,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:57,298 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:14:57,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:14:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:14:57,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:14:57,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:14:57,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:14:57,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:14:57,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:14:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:14:57,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346834319] [2020-10-28 18:14:57,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:14:57,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:14:57,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862763596] [2020-10-28 18:14:57,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:14:57,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:14:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:14:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:14:57,351 INFO L87 Difference]: Start difference. First operand 25889 states and 35853 transitions. Second operand 5 states. [2020-10-28 18:15:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:00,812 INFO L93 Difference]: Finished difference Result 42446 states and 58697 transitions. [2020-10-28 18:15:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:15:00,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-28 18:15:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:00,839 INFO L225 Difference]: With dead ends: 42446 [2020-10-28 18:15:00,840 INFO L226 Difference]: Without dead ends: 22568 [2020-10-28 18:15:00,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:15:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22568 states. [2020-10-28 18:15:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22568 to 22568. [2020-10-28 18:15:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22568 states. [2020-10-28 18:15:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22568 states to 22568 states and 31176 transitions. [2020-10-28 18:15:02,601 INFO L78 Accepts]: Start accepts. Automaton has 22568 states and 31176 transitions. Word has length 165 [2020-10-28 18:15:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:02,601 INFO L481 AbstractCegarLoop]: Abstraction has 22568 states and 31176 transitions. [2020-10-28 18:15:02,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:15:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 22568 states and 31176 transitions. [2020-10-28 18:15:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 18:15:02,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:02,612 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:02,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:15:02,612 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1627097870, now seen corresponding path program 1 times [2020-10-28 18:15:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:02,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125053176] [2020-10-28 18:15:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:02,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:02,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:02,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:02,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:04,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:15:07,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 18:15:07,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 18:15:07,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:08,125 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:15:08,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:08,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:08,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:08,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:08,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:15:08,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:08,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125053176] [2020-10-28 18:15:08,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:08,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:15:08,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886584226] [2020-10-28 18:15:08,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:15:08,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:15:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:15:08,207 INFO L87 Difference]: Start difference. First operand 22568 states and 31176 transitions. Second operand 6 states. [2020-10-28 18:15:08,632 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-28 18:15:11,224 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-28 18:15:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:13,551 INFO L93 Difference]: Finished difference Result 33905 states and 48868 transitions. [2020-10-28 18:15:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:15:13,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2020-10-28 18:15:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:13,576 INFO L225 Difference]: With dead ends: 33905 [2020-10-28 18:15:13,576 INFO L226 Difference]: Without dead ends: 22571 [2020-10-28 18:15:13,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:15:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22571 states. [2020-10-28 18:15:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22571 to 18859. [2020-10-28 18:15:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18859 states. [2020-10-28 18:15:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18859 states to 18859 states and 25679 transitions. [2020-10-28 18:15:14,989 INFO L78 Accepts]: Start accepts. Automaton has 18859 states and 25679 transitions. Word has length 170 [2020-10-28 18:15:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:14,990 INFO L481 AbstractCegarLoop]: Abstraction has 18859 states and 25679 transitions. [2020-10-28 18:15:14,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:15:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 18859 states and 25679 transitions. [2020-10-28 18:15:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 18:15:14,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:14,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:14,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:15:14,999 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash 27443195, now seen corresponding path program 1 times [2020-10-28 18:15:14,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:14,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012822693] [2020-10-28 18:15:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:15,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:15,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:15,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:18,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:18,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:18,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:20,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:15:20,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:20,555 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-28 18:15:20,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:15:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:20,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:15:20,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:15:20,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:15:20,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:15:20,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:15:20,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:15:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:15:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:15:20,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:15:20,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:15:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:15:20,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012822693] [2020-10-28 18:15:20,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:15:20,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:15:20,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377991233] [2020-10-28 18:15:20,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:15:20,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:15:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:15:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:15:20,636 INFO L87 Difference]: Start difference. First operand 18859 states and 25679 transitions. Second operand 6 states. [2020-10-28 18:15:21,190 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2020-10-28 18:15:24,166 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2020-10-28 18:15:27,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:15:27,201 INFO L93 Difference]: Finished difference Result 52014 states and 71291 transitions. [2020-10-28 18:15:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:15:27,202 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2020-10-28 18:15:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:15:27,236 INFO L225 Difference]: With dead ends: 52014 [2020-10-28 18:15:27,236 INFO L226 Difference]: Without dead ends: 34293 [2020-10-28 18:15:27,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:15:27,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34293 states. [2020-10-28 18:15:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34293 to 34285. [2020-10-28 18:15:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34285 states. [2020-10-28 18:15:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34285 states to 34285 states and 46574 transitions. [2020-10-28 18:15:30,015 INFO L78 Accepts]: Start accepts. Automaton has 34285 states and 46574 transitions. Word has length 170 [2020-10-28 18:15:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:15:30,016 INFO L481 AbstractCegarLoop]: Abstraction has 34285 states and 46574 transitions. [2020-10-28 18:15:30,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:15:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 34285 states and 46574 transitions. [2020-10-28 18:15:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 18:15:30,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:30,030 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:30,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:15:30,030 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1093569696, now seen corresponding path program 1 times [2020-10-28 18:15:30,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:30,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076605108] [2020-10-28 18:15:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:30,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:31,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:32,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking...