/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:43:33,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:43:33,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:43:33,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:43:33,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:43:33,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:43:33,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:43:33,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:43:33,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:43:33,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:43:33,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:43:33,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:43:33,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:43:33,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:43:33,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:43:33,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:43:33,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:43:33,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:43:33,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:43:33,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:43:33,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:43:33,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:43:33,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:43:33,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:43:33,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:43:33,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:43:33,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:43:33,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:43:33,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:43:33,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:43:33,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:43:33,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:43:33,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:43:33,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:43:33,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:43:33,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:43:33,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:43:33,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:43:33,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:43:33,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:43:33,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:43:33,221 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 08:43:33,274 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:43:33,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:43:33,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:43:33,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:43:33,280 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:43:33,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:43:33,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:43:33,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:43:33,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:43:33,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:43:33,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:43:33,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:43:33,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:43:33,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:43:33,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:43:33,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:43:33,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:43:33,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:43:33,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:43:33,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:43:33,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:43:33,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:43:33,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:43:33,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:43:33,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:43:33,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:43:33,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:43:33,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:43:33,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:43:33,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:43:33,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:43:33,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:43:33,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:43:33,760 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:43:33,760 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:43:33,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-28 08:43:33,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a3cc97fe/874429fd8ca24885b90d401a45370308/FLAGfb7c3834d [2020-10-28 08:43:34,569 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:43:34,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-28 08:43:34,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a3cc97fe/874429fd8ca24885b90d401a45370308/FLAGfb7c3834d [2020-10-28 08:43:34,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a3cc97fe/874429fd8ca24885b90d401a45370308 [2020-10-28 08:43:34,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:43:34,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:43:34,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:34,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:43:34,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:43:34,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:34" (1/1) ... [2020-10-28 08:43:34,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c76db6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:34, skipping insertion in model container [2020-10-28 08:43:34,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:43:34" (1/1) ... [2020-10-28 08:43:34,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:43:34,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:43:35,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:35,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:43:35,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:43:35,211 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:43:35,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35 WrapperNode [2020-10-28 08:43:35,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:43:35,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:43:35,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:43:35,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:43:35,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (1/1) ... [2020-10-28 08:43:35,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:43:35,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:43:35,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:43:35,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:43:35,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (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 08:43:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:43:35,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:43:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:43:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 08:43:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:43:35,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:43:35,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:43:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:43:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:43:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:43:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 08:43:35,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:43:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-28 08:43:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:43:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:43:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:43:35,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:43:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:43:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:43:35,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:43:35,885 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:43:35,886 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-28 08:43:35,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:35 BoogieIcfgContainer [2020-10-28 08:43:35,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:43:35,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:43:35,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:43:35,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:43:35,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:43:34" (1/3) ... [2020-10-28 08:43:35,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728cf973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:35, skipping insertion in model container [2020-10-28 08:43:35,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:43:35" (2/3) ... [2020-10-28 08:43:35,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728cf973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:43:35, skipping insertion in model container [2020-10-28 08:43:35,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:43:35" (3/3) ... [2020-10-28 08:43:35,897 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2020-10-28 08:43:35,911 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:43:35,918 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:43:35,933 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:43:35,964 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:43:35,965 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:43:35,965 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:43:35,965 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:43:35,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:43:35,965 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:43:35,966 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:43:35,966 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:43:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-28 08:43:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:43:35,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:35,993 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] [2020-10-28 08:43:35,994 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 784075536, now seen corresponding path program 1 times [2020-10-28 08:43:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:36,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630892206] [2020-10-28 08:43:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:36,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:37,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:40,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:40,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:43:40,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:43:40,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4624 [2020-10-28 08:43:40,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:40,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:40,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:43:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:40,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:43:40,959 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-28 08:43:40,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:40,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:40,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:40,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:40,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:40,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 08:43:40,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:40,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:40,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:40,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:40,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:40,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:43:41,016 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 08:43:41,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630892206] [2020-10-28 08:43:41,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:43:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98230016] [2020-10-28 08:43:41,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:43:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:43:41,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:43:41,056 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-28 08:43:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:41,414 INFO L93 Difference]: Finished difference Result 88 states and 125 transitions. [2020-10-28 08:43:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:43:41,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-28 08:43:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:41,427 INFO L225 Difference]: With dead ends: 88 [2020-10-28 08:43:41,427 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:43:41,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:43:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:43:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 08:43:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 08:43:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-28 08:43:41,496 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 29 [2020-10-28 08:43:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:41,497 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-28 08:43:41,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:43:41,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-28 08:43:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:43:41,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:41,503 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] [2020-10-28 08:43:41,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:43:41,504 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:41,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1811168738, now seen corresponding path program 1 times [2020-10-28 08:43:41,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:41,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59955446] [2020-10-28 08:43:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:41,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:41,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:46,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:46,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:43:46,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 08:43:46,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:43:46,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:46,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:43:46,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:46,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:43:46,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:46,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:46,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:46,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:46,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:46,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:46,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:43:46,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:46,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:46,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:46,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:46,713 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 08:43:46,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59955446] [2020-10-28 08:43:46,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:46,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 08:43:46,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347731164] [2020-10-28 08:43:46,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:43:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:46,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:43:46,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:43:46,732 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-28 08:43:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:47,256 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2020-10-28 08:43:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:43:47,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-28 08:43:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:47,258 INFO L225 Difference]: With dead ends: 82 [2020-10-28 08:43:47,259 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 08:43:47,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:43:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 08:43:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-28 08:43:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:43:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-28 08:43:47,287 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 29 [2020-10-28 08:43:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:47,288 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-28 08:43:47,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:43:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-28 08:43:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:43:47,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:47,292 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] [2020-10-28 08:43:47,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:43:47,292 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1846873870, now seen corresponding path program 1 times [2020-10-28 08:43:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:47,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218015279] [2020-10-28 08:43:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:48,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:52,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:43:52,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:43:52,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:43:52,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:52,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:52,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:43:52,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:43:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:52,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:52,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:52,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:52,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:52,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:43:52,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:52,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:52,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:52,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:52,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:52,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 08:43:52,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218015279] [2020-10-28 08:43:52,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:43:52,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:43:52,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740006073] [2020-10-28 08:43:52,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:43:52,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:52,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:43:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:52,450 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2020-10-28 08:43:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:52,715 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-10-28 08:43:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:43:52,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 08:43:52,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:52,720 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:43:52,720 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:43:52,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:43:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:43:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 08:43:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:43:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-28 08:43:52,741 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 45 [2020-10-28 08:43:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:52,743 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-28 08:43:52,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:43:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-28 08:43:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:43:52,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:52,746 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] [2020-10-28 08:43:52,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:43:52,748 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1834269708, now seen corresponding path program 1 times [2020-10-28 08:43:52,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:52,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040171821] [2020-10-28 08:43:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:55,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:57,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:57,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:43:57,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:43:57,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:43:57,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:57,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:57,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:43:57,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:43:57,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:43:57,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:43:57,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:43:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:57,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:57,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:43:57,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:43:57,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:43:57,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:43:57,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:43:57,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:43:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:43:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:43:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:43:57,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:43:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 08:43:57,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040171821] [2020-10-28 08:43:57,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:43:57,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:43:57,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758866903] [2020-10-28 08:43:57,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:43:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:43:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:43:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:43:57,934 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-10-28 08:43:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:43:58,349 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-28 08:43:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:43:58,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-28 08:43:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:43:58,351 INFO L225 Difference]: With dead ends: 98 [2020-10-28 08:43:58,352 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 08:43:58,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:43:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 08:43:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 08:43:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:43:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-28 08:43:58,363 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 47 [2020-10-28 08:43:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:43:58,364 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-28 08:43:58,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:43:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-28 08:43:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:43:58,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:43:58,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 08:43:58,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:43:58,367 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:43:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:43:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash 540070660, now seen corresponding path program 2 times [2020-10-28 08:43:58,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:43:58,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552721144] [2020-10-28 08:43:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:43:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:43:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:43:59,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:00,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:03,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:03,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:44:03,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:44:03,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:44:03,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:03,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:44:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:03,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:44:03,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:03,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:03,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:03,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:03,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:44:03,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:03,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:03,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:03,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 08:44:03,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552721144] [2020-10-28 08:44:03,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:03,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:44:03,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69208731] [2020-10-28 08:44:03,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:44:03,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:03,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:44:03,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:44:03,529 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2020-10-28 08:44:03,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:03,758 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-10-28 08:44:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:44:03,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-28 08:44:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:03,760 INFO L225 Difference]: With dead ends: 120 [2020-10-28 08:44:03,760 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:44:03,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:44:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:44:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 08:44:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:44:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-28 08:44:03,787 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 63 [2020-10-28 08:44:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:03,789 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-28 08:44:03,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:44:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-28 08:44:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:44:03,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:03,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 08:44:03,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:44:03,794 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1240934790, now seen corresponding path program 3 times [2020-10-28 08:44:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027311414] [2020-10-28 08:44:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:03,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:06,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:07,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:07,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:08,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:08,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:09,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:09,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:44:09,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:44:09,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5243 [2020-10-28 08:44:09,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:09,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-28 08:44:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 08:44:09,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:10,497 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-28 08:44:10,889 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-10-28 08:44:11,074 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-10-28 08:44:11,259 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-28 08:44:13,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:13,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:13,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:13,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:13,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:44:13,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:13,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:13,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:13,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:13,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:13,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:44:13,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027311414] [2020-10-28 08:44:13,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:13,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 08:44:13,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591937924] [2020-10-28 08:44:13,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 08:44:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 08:44:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 08:44:13,448 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 37 states. [2020-10-28 08:44:14,305 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-28 08:44:14,771 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-28 08:44:15,264 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-28 08:44:15,556 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-28 08:44:16,108 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 08:44:16,804 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-28 08:44:17,048 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2020-10-28 08:44:17,478 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-28 08:44:17,865 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-28 08:44:18,159 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-28 08:44:18,630 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-28 08:44:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:21,327 INFO L93 Difference]: Finished difference Result 156 states and 181 transitions. [2020-10-28 08:44:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:44:21,328 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 65 [2020-10-28 08:44:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:21,330 INFO L225 Difference]: With dead ends: 156 [2020-10-28 08:44:21,330 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 08:44:21,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=408, Invalid=2898, Unknown=0, NotChecked=0, Total=3306 [2020-10-28 08:44:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 08:44:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 129. [2020-10-28 08:44:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 08:44:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-28 08:44:21,354 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 65 [2020-10-28 08:44:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:21,354 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-28 08:44:21,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 08:44:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-28 08:44:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:44:21,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:21,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 08:44:21,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:44:21,358 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash -523874678, now seen corresponding path program 4 times [2020-10-28 08:44:21,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:21,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392394045] [2020-10-28 08:44:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:21,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:21,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:26,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:44:26,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:44:26,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:44:26,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:26,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:26,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:26,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:44:26,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:44:26,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:26,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:26,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:26,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:26,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:44:26,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:26,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:26,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:26,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:26,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:44:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 08:44:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392394045] [2020-10-28 08:44:26,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:26,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:26,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066725578] [2020-10-28 08:44:26,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:26,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:26,589 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 10 states. [2020-10-28 08:44:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:27,872 INFO L93 Difference]: Finished difference Result 277 states and 329 transitions. [2020-10-28 08:44:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:44:27,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-28 08:44:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:27,876 INFO L225 Difference]: With dead ends: 277 [2020-10-28 08:44:27,876 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 08:44:27,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:44:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 08:44:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2020-10-28 08:44:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-28 08:44:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2020-10-28 08:44:27,906 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 69 [2020-10-28 08:44:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:27,906 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2020-10-28 08:44:27,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2020-10-28 08:44:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:44:27,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:27,909 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 08:44:27,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:44:27,909 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:27,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1809338102, now seen corresponding path program 5 times [2020-10-28 08:44:27,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:27,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605449873] [2020-10-28 08:44:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:28,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:28,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:32,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:32,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:44:32,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:44:32,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:44:32,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:32,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:32,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:44:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:32,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:44:32,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:33,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:33,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:33,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:33,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:33,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:44:33,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:33,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:33,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:44:33,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605449873] [2020-10-28 08:44:33,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:33,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:44:33,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127876589] [2020-10-28 08:44:33,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:44:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:33,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:44:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:44:33,159 INFO L87 Difference]: Start difference. First operand 179 states and 203 transitions. Second operand 11 states. [2020-10-28 08:44:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:34,025 INFO L93 Difference]: Finished difference Result 331 states and 374 transitions. [2020-10-28 08:44:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:44:34,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-10-28 08:44:34,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:34,027 INFO L225 Difference]: With dead ends: 331 [2020-10-28 08:44:34,028 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 08:44:34,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:44:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 08:44:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-28 08:44:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 08:44:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2020-10-28 08:44:34,051 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 69 [2020-10-28 08:44:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:34,052 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2020-10-28 08:44:34,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:44:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2020-10-28 08:44:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:44:34,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:34,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 08:44:34,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:44:34,055 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash 104832524, now seen corresponding path program 6 times [2020-10-28 08:44:34,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:34,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466566809] [2020-10-28 08:44:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:34,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:39,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:39,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:44:39,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:44:39,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:44:39,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:39,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:44:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:39,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:44:39,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:39,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:39,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:39,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:39,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:44:39,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:39,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:39,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:39,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:44:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-28 08:44:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466566809] [2020-10-28 08:44:39,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:39,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:44:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960793000] [2020-10-28 08:44:39,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:44:39,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:44:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:44:39,257 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand 10 states. [2020-10-28 08:44:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:44:40,046 INFO L93 Difference]: Finished difference Result 221 states and 248 transitions. [2020-10-28 08:44:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:44:40,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-28 08:44:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:44:40,048 INFO L225 Difference]: With dead ends: 221 [2020-10-28 08:44:40,048 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 08:44:40,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:44:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 08:44:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 08:44:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:44:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-28 08:44:40,066 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 71 [2020-10-28 08:44:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:44:40,066 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-28 08:44:40,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:44:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-28 08:44:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:44:40,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:44:40,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 08:44:40,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:44:40,074 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:44:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:44:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -826339688, now seen corresponding path program 7 times [2020-10-28 08:44:40,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:44:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931806109] [2020-10-28 08:44:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:44:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:41,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:42,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:45,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:45,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:45,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:44:45,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:44:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5729 [2020-10-28 08:44:45,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:45,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-28 08:44:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:44:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 08:44:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:46,771 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-10-28 08:44:46,915 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-28 08:44:47,075 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-28 08:44:47,231 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2020-10-28 08:44:47,425 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-28 08:44:47,632 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-28 08:44:47,823 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-28 08:44:47,986 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-10-28 08:44:48,166 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2020-10-28 08:44:48,361 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-10-28 08:44:48,755 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 22 [2020-10-28 08:44:48,981 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-10-28 08:44:49,188 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-10-28 08:44:49,391 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-28 08:44:49,611 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-10-28 08:44:49,835 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-28 08:44:50,261 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-28 08:44:50,508 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-10-28 08:44:50,743 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2020-10-28 08:44:51,055 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-10-28 08:44:51,306 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-28 08:44:51,568 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-28 08:44:51,830 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-28 08:44:52,086 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-28 08:44:52,546 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-10-28 08:44:53,601 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-10-28 08:44:53,858 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2020-10-28 08:44:55,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:44:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:44:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:44:55,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:44:55,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:44:55,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:44:55,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:44:55,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:44:55,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:44:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:44:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:44:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:44:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:44:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:44:55,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931806109] [2020-10-28 08:44:55,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:44:55,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-28 08:44:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702427332] [2020-10-28 08:44:55,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-28 08:44:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:44:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-28 08:44:55,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2538, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 08:44:55,511 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 53 states. [2020-10-28 08:44:57,317 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-28 08:44:57,851 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 46 [2020-10-28 08:44:58,295 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 30 [2020-10-28 08:44:59,018 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-10-28 08:45:00,024 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2020-10-28 08:45:00,684 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-28 08:45:01,042 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 21 [2020-10-28 08:45:01,307 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 08:45:01,689 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-28 08:45:01,907 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-28 08:45:02,367 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2020-10-28 08:45:02,619 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-28 08:45:03,120 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-28 08:45:03,881 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-28 08:45:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:09,449 INFO L93 Difference]: Finished difference Result 224 states and 250 transitions. [2020-10-28 08:45:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-28 08:45:09,451 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 83 [2020-10-28 08:45:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:09,452 INFO L225 Difference]: With dead ends: 224 [2020-10-28 08:45:09,452 INFO L226 Difference]: Without dead ends: 100 [2020-10-28 08:45:09,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=615, Invalid=6027, Unknown=0, NotChecked=0, Total=6642 [2020-10-28 08:45:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-28 08:45:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2020-10-28 08:45:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:45:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2020-10-28 08:45:09,486 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 83 [2020-10-28 08:45:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:09,486 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2020-10-28 08:45:09,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-28 08:45:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2020-10-28 08:45:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:45:09,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:09,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 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 08:45:09,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:45:09,493 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 564858906, now seen corresponding path program 8 times [2020-10-28 08:45:09,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:09,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866844115] [2020-10-28 08:45:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:09,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:09,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:09,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:09,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:14,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:14,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:45:14,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:45:14,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:45:14,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:14,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:45:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:45:14,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:14,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:14,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:14,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:14,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:14,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:14,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:45:14,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:14,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:14,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:14,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:45:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-28 08:45:14,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866844115] [2020-10-28 08:45:14,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:14,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:45:14,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246908399] [2020-10-28 08:45:14,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:45:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:45:14,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:45:14,835 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 12 states. [2020-10-28 08:45:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:45:15,912 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2020-10-28 08:45:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:45:15,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-28 08:45:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:45:15,914 INFO L225 Difference]: With dead ends: 164 [2020-10-28 08:45:15,914 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:45:15,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:45:15,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:45:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 08:45:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 08:45:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-28 08:45:15,926 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 85 [2020-10-28 08:45:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:45:15,926 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-28 08:45:15,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:45:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-28 08:45:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:45:15,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:45:15,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 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 08:45:15,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:45:15,928 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:45:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:45:15,929 INFO L82 PathProgramCache]: Analyzing trace with hash -362671318, now seen corresponding path program 9 times [2020-10-28 08:45:15,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:45:15,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198682713] [2020-10-28 08:45:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:45:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:17,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:20,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:22,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:22,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:45:22,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:45:22,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6016 [2020-10-28 08:45:22,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:22,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-28 08:45:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:45:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 08:45:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:24,680 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-28 08:45:24,901 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-28 08:45:25,145 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-28 08:45:25,362 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-28 08:45:25,677 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-28 08:45:25,986 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-28 08:45:26,274 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-28 08:45:26,576 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-28 08:45:26,843 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-28 08:45:27,167 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-28 08:45:27,439 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-28 08:45:27,678 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-28 08:45:27,950 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-28 08:45:28,235 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-28 08:45:28,532 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-28 08:45:28,777 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-28 08:45:29,040 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-28 08:45:29,298 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-28 08:45:29,548 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-28 08:45:29,830 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-28 08:45:30,060 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-28 08:45:30,383 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 08:45:30,637 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-28 08:45:30,907 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-28 08:45:31,165 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-10-28 08:45:31,420 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-28 08:45:31,693 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-28 08:45:31,967 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-28 08:45:32,255 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-28 08:45:32,484 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-28 08:45:32,744 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-10-28 08:45:32,988 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2020-10-28 08:45:33,247 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2020-10-28 08:45:33,520 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-28 08:45:33,772 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-10-28 08:45:34,025 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-10-28 08:45:34,940 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2020-10-28 08:45:35,212 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2020-10-28 08:45:38,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:45:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:45:38,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:45:38,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:45:38,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:45:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:45:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:45:38,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198682713] [2020-10-28 08:45:38,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:45:38,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-28 08:45:38,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202720149] [2020-10-28 08:45:38,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-28 08:45:38,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:45:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-28 08:45:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=5443, Unknown=0, NotChecked=0, Total=6006 [2020-10-28 08:45:38,825 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 78 states. [2020-10-28 08:45:39,591 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 36 [2020-10-28 08:45:41,171 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2020-10-28 08:45:43,224 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 94 [2020-10-28 08:45:44,454 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 85 [2020-10-28 08:45:45,732 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 83 [2020-10-28 08:45:46,885 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 96 [2020-10-28 08:45:47,196 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-10-28 08:45:48,096 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-10-28 08:45:48,510 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 31 [2020-10-28 08:45:49,550 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 93 [2020-10-28 08:45:49,970 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-28 08:45:50,736 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-10-28 08:45:51,173 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 33 [2020-10-28 08:45:51,565 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-28 08:45:51,957 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-28 08:45:52,562 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-28 08:45:52,991 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2020-10-28 08:45:54,105 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 83 [2020-10-28 08:45:54,732 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-28 08:45:55,412 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2020-10-28 08:45:55,833 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-10-28 08:45:56,314 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 08:45:56,849 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-28 08:45:57,271 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 26 [2020-10-28 08:45:58,174 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 26 [2020-10-28 08:45:59,134 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 90 [2020-10-28 08:46:00,179 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 81 [2020-10-28 08:46:01,293 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 95 [2020-10-28 08:46:02,381 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 81 [2020-10-28 08:46:03,529 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 83 [2020-10-28 08:46:03,932 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 22 [2020-10-28 08:46:05,088 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 82 [2020-10-28 08:46:06,023 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 72 [2020-10-28 08:46:06,830 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2020-10-28 08:46:07,554 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-28 08:46:08,037 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-28 08:46:09,058 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2020-10-28 08:46:10,029 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-28 08:46:11,166 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2020-10-28 08:46:12,219 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 92 [2020-10-28 08:46:13,259 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-28 08:46:14,036 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-28 08:46:14,375 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2020-10-28 08:46:15,385 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2020-10-28 08:46:16,007 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-28 08:46:16,444 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 27 [2020-10-28 08:46:17,287 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 73 [2020-10-28 08:46:18,041 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-28 08:46:18,615 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-28 08:46:19,814 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-28 08:46:20,338 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-28 08:46:21,036 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-28 08:46:21,733 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-28 08:46:22,322 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-28 08:46:23,018 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-28 08:46:24,315 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-28 08:46:25,289 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-28 08:46:26,095 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-28 08:46:26,925 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-28 08:46:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:43,227 INFO L93 Difference]: Finished difference Result 444 states and 511 transitions. [2020-10-28 08:46:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-28 08:46:43,229 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 101 [2020-10-28 08:46:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:43,234 INFO L225 Difference]: With dead ends: 444 [2020-10-28 08:46:43,234 INFO L226 Difference]: Without dead ends: 434 [2020-10-28 08:46:43,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5851 ImplicationChecksByTransitivity, 56.6s TimeCoverageRelationStatistics Valid=2128, Invalid=20222, Unknown=0, NotChecked=0, Total=22350 [2020-10-28 08:46:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-28 08:46:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 364. [2020-10-28 08:46:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-28 08:46:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 422 transitions. [2020-10-28 08:46:43,288 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 422 transitions. Word has length 101 [2020-10-28 08:46:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:43,288 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 422 transitions. [2020-10-28 08:46:43,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-28 08:46:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 422 transitions. [2020-10-28 08:46:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:46:43,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:43,290 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 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 08:46:43,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:46:43,291 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:43,291 INFO L82 PathProgramCache]: Analyzing trace with hash -242274962, now seen corresponding path program 10 times [2020-10-28 08:46:43,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:43,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539460901] [2020-10-28 08:46:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:43,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:43,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:43,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:43,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:48,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:48,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:46:48,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:46:48,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:46:48,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:48,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:48,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:46:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 08:46:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:46:48,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:48,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:48,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:48,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:48,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:48,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 08:46:48,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:48,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:48,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:48,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:46:48,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539460901] [2020-10-28 08:46:48,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:48,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:46:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307395866] [2020-10-28 08:46:48,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:46:48,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:46:48,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:46:48,838 INFO L87 Difference]: Start difference. First operand 364 states and 422 transitions. Second operand 14 states. [2020-10-28 08:46:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:46:52,511 INFO L93 Difference]: Finished difference Result 681 states and 788 transitions. [2020-10-28 08:46:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:46:52,513 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-28 08:46:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:46:52,518 INFO L225 Difference]: With dead ends: 681 [2020-10-28 08:46:52,518 INFO L226 Difference]: Without dead ends: 466 [2020-10-28 08:46:52,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:46:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-28 08:46:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 428. [2020-10-28 08:46:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-28 08:46:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 480 transitions. [2020-10-28 08:46:52,570 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 480 transitions. Word has length 105 [2020-10-28 08:46:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:46:52,570 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 480 transitions. [2020-10-28 08:46:52,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:46:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 480 transitions. [2020-10-28 08:46:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:46:52,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:46:52,572 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 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 08:46:52,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:46:52,573 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:46:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:46:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1753438546, now seen corresponding path program 11 times [2020-10-28 08:46:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:46:52,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266571526] [2020-10-28 08:46:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:46:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:52,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:52,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:52,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:57,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:57,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:46:57,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:46:57,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:46:57,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:57,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:57,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:46:57,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:46:57,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 08:46:57,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:58,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:46:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:46:58,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:46:58,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:46:58,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:46:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:46:58,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:46:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:46:58,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266571526] [2020-10-28 08:46:58,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:46:58,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:46:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434815404] [2020-10-28 08:46:58,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:46:58,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:46:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:46:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:46:58,045 INFO L87 Difference]: Start difference. First operand 428 states and 480 transitions. Second operand 14 states. [2020-10-28 08:47:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:47:00,335 INFO L93 Difference]: Finished difference Result 702 states and 785 transitions. [2020-10-28 08:47:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:47:00,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-28 08:47:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:47:00,342 INFO L225 Difference]: With dead ends: 702 [2020-10-28 08:47:00,342 INFO L226 Difference]: Without dead ends: 337 [2020-10-28 08:47:00,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:47:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-28 08:47:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 317. [2020-10-28 08:47:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-28 08:47:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 356 transitions. [2020-10-28 08:47:00,388 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 356 transitions. Word has length 105 [2020-10-28 08:47:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:47:00,389 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 356 transitions. [2020-10-28 08:47:00,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:47:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 356 transitions. [2020-10-28 08:47:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:47:00,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:47:00,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 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 08:47:00,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:47:00,392 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:47:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:47:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash -994617540, now seen corresponding path program 12 times [2020-10-28 08:47:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:47:00,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381282792] [2020-10-28 08:47:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:47:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:47:00,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:03,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:47:05,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:47:05,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:47:05,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:47:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:47:05,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:47:05,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:47:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-28 08:47:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:47:05,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 08:47:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:47:07,897 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-10-28 08:47:08,149 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2020-10-28 08:47:08,764 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-10-28 08:47:09,056 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2020-10-28 08:47:10,088 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-28 08:47:10,975 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-10-28 08:47:11,251 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2020-10-28 08:47:11,517 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-10-28 08:47:11,827 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31