/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:36:34,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:36:34,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:36:34,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:36:34,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:36:34,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:36:34,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:36:34,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:36:34,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:36:34,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:36:34,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:36:34,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:36:34,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:36:34,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:36:34,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:36:34,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:36:34,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:36:34,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:36:34,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:36:34,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:36:34,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:36:34,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:36:34,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:36:34,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:36:34,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:36:34,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:36:34,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:36:34,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:36:34,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:36:34,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:36:34,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:36:34,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:36:34,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:36:34,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:36:34,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:36:34,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:36:34,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:36:34,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:36:34,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:36:34,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:36:34,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:36:34,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:36:34,329 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:36:34,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:36:34,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:36:34,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:36:34,335 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:36:34,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:36:34,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:36:34,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:36:34,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:36:34,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:36:34,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:36:34,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:36:34,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:36:34,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:36:34,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:36:34,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:36:34,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:36:34,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:36:34,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:36:34,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:36:34,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:36:34,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:36:34,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:36:34,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:36:34,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:36:34,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:36:34,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:36:34,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:36:34,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:36:34,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:36:34,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:36:34,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:36:34,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:36:34,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:36:34,763 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:36:34,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-29 09:36:34,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6295be99f/7419b6d63aac4584ab09bd58696fdec4/FLAGe39953fd1 [2020-10-29 09:36:35,442 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:36:35,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2020-10-29 09:36:35,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6295be99f/7419b6d63aac4584ab09bd58696fdec4/FLAGe39953fd1 [2020-10-29 09:36:35,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6295be99f/7419b6d63aac4584ab09bd58696fdec4 [2020-10-29 09:36:35,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:36:35,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:36:35,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:36:35,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:36:35,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:36:35,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:36:35" (1/1) ... [2020-10-29 09:36:35,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@767731a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:35, skipping insertion in model container [2020-10-29 09:36:35,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:36:35" (1/1) ... [2020-10-29 09:36:35,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:36:35,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:36:36,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:36:36,078 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:36:36,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:36:36,112 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:36:36,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36 WrapperNode [2020-10-29 09:36:36,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:36:36,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:36:36,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:36:36,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:36:36,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... [2020-10-29 09:36:36,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:36:36,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:36:36,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:36:36,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:36:36,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:36:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:36:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:36:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:36:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:36:36,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:36:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:36:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:36:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:36:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:36:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:36:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:36:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:36:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:36:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:36:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:36:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:36:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:36:36,538 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:36:36,538 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:36:36,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:36:36 BoogieIcfgContainer [2020-10-29 09:36:36,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:36:36,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:36:36,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:36:36,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:36:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:36:35" (1/3) ... [2020-10-29 09:36:36,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c19e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:36:36, skipping insertion in model container [2020-10-29 09:36:36,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:36:36" (2/3) ... [2020-10-29 09:36:36,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c19e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:36:36, skipping insertion in model container [2020-10-29 09:36:36,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:36:36" (3/3) ... [2020-10-29 09:36:36,550 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2020-10-29 09:36:36,565 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:36:36,570 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:36:36,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:36:36,620 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:36:36,620 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:36:36,620 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:36:36,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:36:36,621 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:36:36,621 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:36:36,621 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:36:36,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:36:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-29 09:36:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:36:36,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:36,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:36,647 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2005875033, now seen corresponding path program 1 times [2020-10-29 09:36:36,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:36,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756195324] [2020-10-29 09:36:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:36,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:36,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:36,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:36:36,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:36,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-29 09:36:36,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:36,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:36,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:36:36,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:36,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:36:37,141 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-29 09:36:37,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:37,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:37,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:37,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:37,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:37,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 09:36:37,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:37,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:37,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:37,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756195324] [2020-10-29 09:36:37,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:36:37,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:36:37,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535791250] [2020-10-29 09:36:37,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:36:37,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:37,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:36:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:36:37,221 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-29 09:36:37,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:37,282 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-10-29 09:36:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:36:37,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:36:37,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:37,292 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:36:37,292 INFO L226 Difference]: Without dead ends: 15 [2020-10-29 09:36:37,296 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 [2020-10-29 09:36:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-29 09:36:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-29 09:36:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-29 09:36:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-29 09:36:37,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-29 09:36:37,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:37,337 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-29 09:36:37,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:36:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-29 09:36:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:36:37,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:37,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:37,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:36:37,339 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:37,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:37,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1519179466, now seen corresponding path program 1 times [2020-10-29 09:36:37,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:37,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238219581] [2020-10-29 09:36:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:37,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:37,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:36:37,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:37,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-29 09:36:37,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:37,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:37,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:36:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:37,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:36:37,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:37,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:37,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:37,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:37,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:37,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:37,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:36:37,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:37,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:37,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:37,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:37,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238219581] [2020-10-29 09:36:37,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:36:37,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:36:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933796782] [2020-10-29 09:36:37,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:36:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:36:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:36:37,576 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-29 09:36:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:37,748 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-29 09:36:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:36:37,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:36:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:37,751 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:36:37,751 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:36:37,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:36:37,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:36:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-29 09:36:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:36:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-29 09:36:37,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-29 09:36:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:37,774 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-29 09:36:37,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:36:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-29 09:36:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:36:37,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:37,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:37,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:36:37,777 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 956003377, now seen corresponding path program 1 times [2020-10-29 09:36:37,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:37,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631214849] [2020-10-29 09:36:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:37,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:37,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:38,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:38,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:38,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:36:38,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:36:38,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-29 09:36:38,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:38,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:38,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:36:38,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:38,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:36:38,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:38,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:38,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:38,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:38,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:38,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:36:38,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:38,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:38,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:38,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631214849] [2020-10-29 09:36:38,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:38,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:36:38,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225219208] [2020-10-29 09:36:38,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:36:38,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:38,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:36:38,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:36:38,661 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2020-10-29 09:36:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:38,819 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-29 09:36:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:36:38,819 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:36:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:38,820 INFO L225 Difference]: With dead ends: 27 [2020-10-29 09:36:38,821 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:36:38,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:36:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:36:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-29 09:36:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:36:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-29 09:36:38,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-29 09:36:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:38,830 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-29 09:36:38,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:36:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-29 09:36:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:36:38,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:38,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:38,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:36:38,832 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:38,832 INFO L82 PathProgramCache]: Analyzing trace with hash -480605846, now seen corresponding path program 2 times [2020-10-29 09:36:38,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:38,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834027992] [2020-10-29 09:36:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:38,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:38,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:38,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:38,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:39,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:39,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:36:39,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:36:39,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-29 09:36:39,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:39,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:39,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:36:39,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:39,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:36:39,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:39,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:39,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:39,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:39,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:39,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:36:39,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:39,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:39,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834027992] [2020-10-29 09:36:39,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:39,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:36:39,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42270609] [2020-10-29 09:36:39,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:36:39,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:36:39,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:36:39,648 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2020-10-29 09:36:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:39,814 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-29 09:36:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:36:39,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:36:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:39,816 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:36:39,816 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:36:39,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:36:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:36:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-29 09:36:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:36:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-29 09:36:39,824 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-10-29 09:36:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:39,825 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-29 09:36:39,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:36:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-29 09:36:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:36:39,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:39,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:39,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:36:39,826 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:39,827 INFO L82 PathProgramCache]: Analyzing trace with hash 843136401, now seen corresponding path program 3 times [2020-10-29 09:36:39,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:39,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913782198] [2020-10-29 09:36:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:39,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:39,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:39,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:40,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:41,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:41,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:36:41,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:36:41,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1864 [2020-10-29 09:36:41,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:41,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:36:41,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:41,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:36:41,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:41,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:41,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:41,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:41,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:41,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:36:41,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:41,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:41,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:41,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:36:41,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913782198] [2020-10-29 09:36:41,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:41,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:36:41,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866887990] [2020-10-29 09:36:41,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:36:41,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:36:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:36:41,850 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-29 09:36:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:42,126 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-29 09:36:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:36:42,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-29 09:36:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:42,128 INFO L225 Difference]: With dead ends: 31 [2020-10-29 09:36:42,128 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:36:42,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:36:42,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:36:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:36:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:36:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-29 09:36:42,137 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2020-10-29 09:36:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:42,138 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-29 09:36:42,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:36:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-29 09:36:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:36:42,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:42,139 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:42,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:36:42,139 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:42,140 INFO L82 PathProgramCache]: Analyzing trace with hash 58704906, now seen corresponding path program 4 times [2020-10-29 09:36:42,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:42,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659615397] [2020-10-29 09:36:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:45,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:36:45,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 09:36:45,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3569 [2020-10-29 09:36:45,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:45,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:36:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:36:45,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:45,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:45,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:45,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:45,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:45,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:36:45,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:45,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:45,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:45,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:45,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659615397] [2020-10-29 09:36:45,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:45,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:36:45,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142765656] [2020-10-29 09:36:45,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:36:45,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:36:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:36:45,858 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-29 09:36:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:46,235 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-29 09:36:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:36:46,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-29 09:36:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:46,236 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:36:46,236 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:36:46,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:36:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:36:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-29 09:36:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:36:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-29 09:36:46,248 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 24 [2020-10-29 09:36:46,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:46,249 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-29 09:36:46,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:36:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-29 09:36:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:36:46,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:46,250 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:46,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:36:46,251 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:46,251 INFO L82 PathProgramCache]: Analyzing trace with hash -315193686, now seen corresponding path program 5 times [2020-10-29 09:36:46,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:46,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601919648] [2020-10-29 09:36:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:46,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:51,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:51,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:36:51,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:36:51,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:36:51,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:51,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:36:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:36:51,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:36:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:51,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:51,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:51,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:36:51,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:51,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:51,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:51,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601919648] [2020-10-29 09:36:51,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:51,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:36:51,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008566476] [2020-10-29 09:36:51,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:36:51,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:36:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:36:51,465 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2020-10-29 09:36:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:52,007 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2020-10-29 09:36:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:36:52,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-29 09:36:52,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:52,009 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:36:52,010 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:36:52,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:36:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:36:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-29 09:36:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:36:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-29 09:36:52,033 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 30 [2020-10-29 09:36:52,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:52,033 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-29 09:36:52,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:36:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-29 09:36:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:36:52,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:52,035 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:52,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:36:52,035 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:52,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1086795446, now seen corresponding path program 6 times [2020-10-29 09:36:52,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:52,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164869273] [2020-10-29 09:36:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:52,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:52,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:57,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:57,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:36:57,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:36:57,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:36:57,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:57,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:57,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:36:57,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:57,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:36:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:36:57,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:57,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:57,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:57,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:57,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:57,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:36:57,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:57,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:57,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:57,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:57,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164869273] [2020-10-29 09:36:57,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:57,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:36:57,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675246179] [2020-10-29 09:36:57,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:36:57,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:36:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:36:57,296 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 12 states. [2020-10-29 09:36:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:58,095 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-29 09:36:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:36:58,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-29 09:36:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:58,096 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:36:58,096 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:36:58,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:36:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:36:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-29 09:36:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:36:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-29 09:36:58,110 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 36 [2020-10-29 09:36:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:58,110 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-29 09:36:58,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:36:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-29 09:36:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:36:58,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:58,112 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:58,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:36:58,112 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash 616604650, now seen corresponding path program 7 times [2020-10-29 09:36:58,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:58,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444390782] [2020-10-29 09:36:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:59,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:03,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:03,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:37:03,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 09:37:03,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 09:37:03,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:03,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:03,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:37:03,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:03,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:37:03,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:03,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:03,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:03,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:03,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:03,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:03,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:03,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:03,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:03,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:03,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:03,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444390782] [2020-10-29 09:37:03,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:03,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:37:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331844903] [2020-10-29 09:37:03,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:37:03,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:03,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:37:03,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:37:03,433 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 14 states. [2020-10-29 09:37:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:04,475 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-29 09:37:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:37:04,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-29 09:37:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:04,478 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:37:04,478 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:37:04,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:37:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:37:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-29 09:37:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:37:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-10-29 09:37:04,502 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 42 [2020-10-29 09:37:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:04,502 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-10-29 09:37:04,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:37:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-10-29 09:37:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:37:04,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:04,504 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:04,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:37:04,504 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:04,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:04,505 INFO L82 PathProgramCache]: Analyzing trace with hash -175636854, now seen corresponding path program 8 times [2020-10-29 09:37:04,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:04,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043032728] [2020-10-29 09:37:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:04,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:08,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:09,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:37:09,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 09:37:09,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 09:37:09,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:09,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:09,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:37:09,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 09:37:09,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:37:09,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:09,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:09,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:09,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:09,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:37:09,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:09,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:09,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-10-29 09:37:09,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043032728] [2020-10-29 09:37:09,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:09,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:37:09,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52399577] [2020-10-29 09:37:09,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:37:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:37:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:37:09,641 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 4 states. [2020-10-29 09:37:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:09,739 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2020-10-29 09:37:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:37:09,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-29 09:37:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:09,741 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:37:09,741 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:37:09,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:37:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:37:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:37:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-10-29 09:37:09,760 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 48 [2020-10-29 09:37:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:09,761 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-10-29 09:37:09,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:37:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-10-29 09:37:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:37:09,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:09,762 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:09,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:37:09,763 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2049295358, now seen corresponding path program 1 times [2020-10-29 09:37:09,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:09,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905327495] [2020-10-29 09:37:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:09,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:10,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 09:37:14,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:14,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:14,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:14,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:14,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:14,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:14,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:14,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 203 proven. 1 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-29 09:37:14,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905327495] [2020-10-29 09:37:14,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:14,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:37:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353146830] [2020-10-29 09:37:14,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:37:14,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:37:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:37:14,882 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 5 states. [2020-10-29 09:37:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:15,013 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-29 09:37:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:37:15,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-10-29 09:37:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:15,015 INFO L225 Difference]: With dead ends: 125 [2020-10-29 09:37:15,015 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:37:15,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:37:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-29 09:37:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:37:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-29 09:37:15,039 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 60 [2020-10-29 09:37:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:15,039 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-29 09:37:15,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:37:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-29 09:37:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:37:15,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:15,041 INFO L422 BasicCegarLoop]: trace histogram [24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:15,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:37:15,041 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1304051446, now seen corresponding path program 2 times [2020-10-29 09:37:15,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:15,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326714483] [2020-10-29 09:37:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:15,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:17,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:20,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:37:20,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 09:37:20,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:37:20,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:20,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:20,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:37:20,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:37:20,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:37:20,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:20,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:20,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:20,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:20,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:20,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 111 proven. 3 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-29 09:37:20,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326714483] [2020-10-29 09:37:20,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:20,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:37:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043770708] [2020-10-29 09:37:20,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:37:20,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:37:20,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:37:20,191 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 6 states. [2020-10-29 09:37:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:20,380 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2020-10-29 09:37:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:37:20,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 09:37:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:20,381 INFO L225 Difference]: With dead ends: 148 [2020-10-29 09:37:20,381 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:37:20,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:37:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-29 09:37:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:37:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-10-29 09:37:20,409 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 72 [2020-10-29 09:37:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:20,410 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-10-29 09:37:20,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:37:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-10-29 09:37:20,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:37:20,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:20,411 INFO L422 BasicCegarLoop]: trace histogram [36, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:20,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:37:20,412 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:20,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1981679742, now seen corresponding path program 3 times [2020-10-29 09:37:20,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:20,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364160647] [2020-10-29 09:37:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:20,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:20,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:22,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:25,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:25,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:37:25,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:37:25,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:25,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:25,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:25,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:25,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:25,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:25,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:25,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:25,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 734 proven. 6 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-29 09:37:25,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364160647] [2020-10-29 09:37:25,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:25,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:37:25,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281248958] [2020-10-29 09:37:25,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:37:25,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:37:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:25,577 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 7 states. [2020-10-29 09:37:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:25,797 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2020-10-29 09:37:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:37:25,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-29 09:37:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:25,799 INFO L225 Difference]: With dead ends: 171 [2020-10-29 09:37:25,799 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:37:25,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:37:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:37:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:37:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-29 09:37:25,843 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 84 [2020-10-29 09:37:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:25,844 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-29 09:37:25,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:37:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-29 09:37:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:37:25,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:25,850 INFO L422 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:25,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:37:25,851 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1186046858, now seen corresponding path program 4 times [2020-10-29 09:37:25,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:25,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752796295] [2020-10-29 09:37:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:25,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:25,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:26,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:29,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:30,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:37:30,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:31,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:31,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:31,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:31,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:31,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:31,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:31,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:31,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 558 proven. 10 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2020-10-29 09:37:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752796295] [2020-10-29 09:37:31,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:31,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:37:31,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586113447] [2020-10-29 09:37:31,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:37:31,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:37:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:37:31,039 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 8 states. [2020-10-29 09:37:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:31,426 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2020-10-29 09:37:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:37:31,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-29 09:37:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:31,428 INFO L225 Difference]: With dead ends: 194 [2020-10-29 09:37:31,428 INFO L226 Difference]: Without dead ends: 109 [2020-10-29 09:37:31,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-29 09:37:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-29 09:37:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:37:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-10-29 09:37:31,493 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 96 [2020-10-29 09:37:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:31,493 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-10-29 09:37:31,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:37:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-10-29 09:37:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 09:37:31,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:31,498 INFO L422 BasicCegarLoop]: trace histogram [60, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:31,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:37:31,499 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash -97211138, now seen corresponding path program 5 times [2020-10-29 09:37:31,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:31,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993767780] [2020-10-29 09:37:31,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:31,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:36,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:36,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 09:37:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:37:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:36,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:36,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:36,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:36,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:36,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:36,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:36,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:36,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:36,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:36,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:36,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:36,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 1554 proven. 15 refuted. 0 times theorem prover too weak. 1131 trivial. 0 not checked. [2020-10-29 09:37:36,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993767780] [2020-10-29 09:37:36,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:36,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:37:36,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073573893] [2020-10-29 09:37:36,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:37:36,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:37:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:36,743 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 9 states. [2020-10-29 09:37:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:37,183 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2020-10-29 09:37:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:37:37,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 108 [2020-10-29 09:37:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:37,185 INFO L225 Difference]: With dead ends: 217 [2020-10-29 09:37:37,185 INFO L226 Difference]: Without dead ends: 121 [2020-10-29 09:37:37,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-29 09:37:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-29 09:37:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:37:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2020-10-29 09:37:37,229 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 108 [2020-10-29 09:37:37,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:37,230 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2020-10-29 09:37:37,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:37:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2020-10-29 09:37:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 09:37:37,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:37,232 INFO L422 BasicCegarLoop]: trace histogram [72, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:37,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:37:37,232 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -990140918, now seen corresponding path program 6 times [2020-10-29 09:37:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:37,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324025805] [2020-10-29 09:37:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:37,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:37:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-29 09:37:42,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:37:42,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:42,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:42,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:42,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:42,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:42,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:42,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:42,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:42,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:42,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3630 backedges. 2086 proven. 21 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-10-29 09:37:42,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324025805] [2020-10-29 09:37:42,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:42,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:37:42,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163309932] [2020-10-29 09:37:42,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:37:42,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:37:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:37:42,472 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand 10 states. [2020-10-29 09:37:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:42,887 INFO L93 Difference]: Finished difference Result 240 states and 275 transitions. [2020-10-29 09:37:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:37:42,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 120 [2020-10-29 09:37:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:42,890 INFO L225 Difference]: With dead ends: 240 [2020-10-29 09:37:42,890 INFO L226 Difference]: Without dead ends: 133 [2020-10-29 09:37:42,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:37:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-29 09:37:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-29 09:37:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:37:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2020-10-29 09:37:42,931 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 120 [2020-10-29 09:37:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:42,931 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2020-10-29 09:37:42,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:37:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2020-10-29 09:37:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 09:37:42,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:42,933 INFO L422 BasicCegarLoop]: trace histogram [84, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:42,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:37:42,933 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:42,934 INFO L82 PathProgramCache]: Analyzing trace with hash -243682946, now seen corresponding path program 7 times [2020-10-29 09:37:42,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:42,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067090784] [2020-10-29 09:37:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:43,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:43,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:43,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:37:47,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:48,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:48,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:48,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:48,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2568 proven. 28 refuted. 0 times theorem prover too weak. 2108 trivial. 0 not checked. [2020-10-29 09:37:48,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067090784] [2020-10-29 09:37:48,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:48,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:37:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307018051] [2020-10-29 09:37:48,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:37:48,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:48,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:37:48,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:48,214 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand 11 states. [2020-10-29 09:37:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:48,693 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-10-29 09:37:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:37:48,693 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2020-10-29 09:37:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:48,695 INFO L225 Difference]: With dead ends: 263 [2020-10-29 09:37:48,695 INFO L226 Difference]: Without dead ends: 145 [2020-10-29 09:37:48,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:37:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-29 09:37:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-29 09:37:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-29 09:37:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2020-10-29 09:37:48,734 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 132 [2020-10-29 09:37:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:48,734 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2020-10-29 09:37:48,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:37:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2020-10-29 09:37:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-29 09:37:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:48,736 INFO L422 BasicCegarLoop]: trace histogram [96, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:48,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:37:48,736 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash -447494006, now seen corresponding path program 8 times [2020-10-29 09:37:48,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:48,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026988101] [2020-10-29 09:37:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:53,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:53,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 09:37:53,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:37:53,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 09:37:53,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:53,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:53,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:37:53,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-29 09:37:53,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:37:53,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:54,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:54,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 3398 proven. 36 refuted. 0 times theorem prover too weak. 2488 trivial. 0 not checked. [2020-10-29 09:37:54,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026988101] [2020-10-29 09:37:54,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:54,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:37:54,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205669367] [2020-10-29 09:37:54,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:37:54,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:54,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:37:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:37:54,045 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand 12 states. [2020-10-29 09:37:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:54,609 INFO L93 Difference]: Finished difference Result 286 states and 321 transitions. [2020-10-29 09:37:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:37:54,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 144 [2020-10-29 09:37:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:54,611 INFO L225 Difference]: With dead ends: 286 [2020-10-29 09:37:54,611 INFO L226 Difference]: Without dead ends: 157 [2020-10-29 09:37:54,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:37:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-29 09:37:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-29 09:37:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:37:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 169 transitions. [2020-10-29 09:37:54,663 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 169 transitions. Word has length 144 [2020-10-29 09:37:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:54,663 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 169 transitions. [2020-10-29 09:37:54,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:37:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 169 transitions. [2020-10-29 09:37:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-29 09:37:54,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:54,665 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:54,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:37:54,666 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1057155586, now seen corresponding path program 9 times [2020-10-29 09:37:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:54,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131312106] [2020-10-29 09:37:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:54,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:54,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:59,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:59,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-29 09:37:59,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 09:37:59,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 09:37:59,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:59,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:37:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:37:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:37:59,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:59,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:00,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:00,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:00,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:38:00,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:00,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:00,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:00,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7284 backedges. 1112 proven. 45 refuted. 0 times theorem prover too weak. 6127 trivial. 0 not checked. [2020-10-29 09:38:00,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131312106] [2020-10-29 09:38:00,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:00,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:38:00,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684737266] [2020-10-29 09:38:00,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:38:00,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:38:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:38:00,033 INFO L87 Difference]: Start difference. First operand 157 states and 169 transitions. Second operand 13 states. [2020-10-29 09:38:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:00,606 INFO L93 Difference]: Finished difference Result 309 states and 344 transitions. [2020-10-29 09:38:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:38:00,607 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-10-29 09:38:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:00,608 INFO L225 Difference]: With dead ends: 309 [2020-10-29 09:38:00,608 INFO L226 Difference]: Without dead ends: 169 [2020-10-29 09:38:00,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:38:00,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-29 09:38:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-29 09:38:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 09:38:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2020-10-29 09:38:00,654 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 156 [2020-10-29 09:38:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:00,654 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2020-10-29 09:38:00,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:38:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2020-10-29 09:38:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-29 09:38:00,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:00,656 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:00,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:38:00,657 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:00,657 INFO L82 PathProgramCache]: Analyzing trace with hash 99224330, now seen corresponding path program 10 times [2020-10-29 09:38:00,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:00,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072665039] [2020-10-29 09:38:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:00,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:05,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:05,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-29 09:38:05,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:05,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-29 09:38:05,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:05,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:38:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-29 09:38:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:06,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:06,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:06,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:06,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:06,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:06,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:06,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:06,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:06,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:06,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:06,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-29 09:38:06,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072665039] [2020-10-29 09:38:06,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:06,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:38:06,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377196353] [2020-10-29 09:38:06,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:38:06,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:38:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:38:06,202 INFO L87 Difference]: Start difference. First operand 169 states and 181 transitions. Second operand 16 states. [2020-10-29 09:38:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:07,353 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-29 09:38:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:38:07,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-10-29 09:38:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:07,355 INFO L225 Difference]: With dead ends: 213 [2020-10-29 09:38:07,355 INFO L226 Difference]: Without dead ends: 207 [2020-10-29 09:38:07,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:38:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-29 09:38:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 195. [2020-10-29 09:38:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-29 09:38:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2020-10-29 09:38:07,406 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 168 [2020-10-29 09:38:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:07,407 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2020-10-29 09:38:07,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:38:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2020-10-29 09:38:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-29 09:38:07,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:07,410 INFO L422 BasicCegarLoop]: trace histogram [140, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:07,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:38:07,410 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1326343574, now seen corresponding path program 11 times [2020-10-29 09:38:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:07,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217249650] [2020-10-29 09:38:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:07,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:08,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:12,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:12,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-29 09:38:12,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-29 09:38:12,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:12,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:12,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:12,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:12,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:12,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:12,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:12,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11977 backedges. 0 proven. 11207 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-29 09:38:13,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217249650] [2020-10-29 09:38:13,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:13,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:38:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692344357] [2020-10-29 09:38:13,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:38:13,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:13,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:38:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:38:13,019 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 18 states. [2020-10-29 09:38:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:14,515 INFO L93 Difference]: Finished difference Result 239 states and 256 transitions. [2020-10-29 09:38:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:38:14,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 194 [2020-10-29 09:38:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:14,517 INFO L225 Difference]: With dead ends: 239 [2020-10-29 09:38:14,517 INFO L226 Difference]: Without dead ends: 233 [2020-10-29 09:38:14,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:38:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-29 09:38:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-10-29 09:38:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-10-29 09:38:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 237 transitions. [2020-10-29 09:38:14,578 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 237 transitions. Word has length 194 [2020-10-29 09:38:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:14,578 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 237 transitions. [2020-10-29 09:38:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:38:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 237 transitions. [2020-10-29 09:38:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-29 09:38:14,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:14,581 INFO L422 BasicCegarLoop]: trace histogram [160, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:14,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:38:14,581 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash -671436342, now seen corresponding path program 12 times [2020-10-29 09:38:14,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:14,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38101281] [2020-10-29 09:38:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:14,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:15,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:19,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:19,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-29 09:38:19,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-29 09:38:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:20,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:20,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 0 proven. 14776 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2020-10-29 09:38:20,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38101281] [2020-10-29 09:38:20,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:20,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:38:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435706392] [2020-10-29 09:38:20,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:38:20,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:38:20,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:38:20,285 INFO L87 Difference]: Start difference. First operand 221 states and 237 transitions. Second operand 20 states. [2020-10-29 09:38:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:22,021 INFO L93 Difference]: Finished difference Result 265 states and 284 transitions. [2020-10-29 09:38:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:38:22,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 220 [2020-10-29 09:38:22,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:22,027 INFO L225 Difference]: With dead ends: 265 [2020-10-29 09:38:22,027 INFO L226 Difference]: Without dead ends: 259 [2020-10-29 09:38:22,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:38:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-29 09:38:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-10-29 09:38:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-29 09:38:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 265 transitions. [2020-10-29 09:38:22,077 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 265 transitions. Word has length 220 [2020-10-29 09:38:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:22,078 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 265 transitions. [2020-10-29 09:38:22,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:38:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 265 transitions. [2020-10-29 09:38:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-29 09:38:22,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:22,082 INFO L422 BasicCegarLoop]: trace histogram [180, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:22,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:38:22,082 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1666494166, now seen corresponding path program 13 times [2020-10-29 09:38:22,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:22,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940161883] [2020-10-29 09:38:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:27,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-29 09:38:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:27,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:27,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:27,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:27,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:27,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:27,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:27,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:27,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:27,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:27,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:27,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:27,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 19827 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-29 09:38:28,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940161883] [2020-10-29 09:38:28,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:28,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:38:28,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548393323] [2020-10-29 09:38:28,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:38:28,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:38:28,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:38:28,134 INFO L87 Difference]: Start difference. First operand 247 states and 265 transitions. Second operand 22 states. [2020-10-29 09:38:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:30,292 INFO L93 Difference]: Finished difference Result 291 states and 312 transitions. [2020-10-29 09:38:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:38:30,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 246 [2020-10-29 09:38:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:30,295 INFO L225 Difference]: With dead ends: 291 [2020-10-29 09:38:30,295 INFO L226 Difference]: Without dead ends: 285 [2020-10-29 09:38:30,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:38:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-29 09:38:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 273. [2020-10-29 09:38:30,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-29 09:38:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 293 transitions. [2020-10-29 09:38:30,357 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 293 transitions. Word has length 246 [2020-10-29 09:38:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:30,358 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 293 transitions. [2020-10-29 09:38:30,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:38:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 293 transitions. [2020-10-29 09:38:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-29 09:38:30,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:30,360 INFO L422 BasicCegarLoop]: trace histogram [200, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:30,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:38:30,360 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1121355638, now seen corresponding path program 14 times [2020-10-29 09:38:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:30,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482635468] [2020-10-29 09:38:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:30,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:32,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:38:35,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:35,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 262 [2020-10-29 09:38:35,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:36,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:36,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:36,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24490 backedges. 0 proven. 23390 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2020-10-29 09:38:36,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482635468] [2020-10-29 09:38:36,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:36,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:38:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603725319] [2020-10-29 09:38:36,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:38:36,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:38:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:38:36,299 INFO L87 Difference]: Start difference. First operand 273 states and 293 transitions. Second operand 24 states. [2020-10-29 09:38:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:38,681 INFO L93 Difference]: Finished difference Result 317 states and 340 transitions. [2020-10-29 09:38:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:38:38,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 272 [2020-10-29 09:38:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:38,686 INFO L225 Difference]: With dead ends: 317 [2020-10-29 09:38:38,686 INFO L226 Difference]: Without dead ends: 311 [2020-10-29 09:38:38,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:38:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-29 09:38:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 299. [2020-10-29 09:38:38,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-29 09:38:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 321 transitions. [2020-10-29 09:38:38,771 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 321 transitions. Word has length 272 [2020-10-29 09:38:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:38,772 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 321 transitions. [2020-10-29 09:38:38,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:38:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 321 transitions. [2020-10-29 09:38:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-29 09:38:38,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:38,774 INFO L422 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:38,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:38:38,774 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:38,775 INFO L82 PathProgramCache]: Analyzing trace with hash -199546902, now seen corresponding path program 15 times [2020-10-29 09:38:38,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:38,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016596941] [2020-10-29 09:38:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:38,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:42,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 308 [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:43,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:38:43,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:43,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 288 [2020-10-29 09:38:43,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:44,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:44,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:44,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:44,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2020-10-29 09:38:44,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016596941] [2020-10-29 09:38:44,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:44,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:38:44,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955531581] [2020-10-29 09:38:44,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:38:44,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:44,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:38:44,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:38:44,977 INFO L87 Difference]: Start difference. First operand 299 states and 321 transitions. Second operand 26 states. [2020-10-29 09:38:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:48,012 INFO L93 Difference]: Finished difference Result 343 states and 368 transitions. [2020-10-29 09:38:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:38:48,012 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 298 [2020-10-29 09:38:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:48,015 INFO L225 Difference]: With dead ends: 343 [2020-10-29 09:38:48,015 INFO L226 Difference]: Without dead ends: 337 [2020-10-29 09:38:48,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:38:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-29 09:38:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 325. [2020-10-29 09:38:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-29 09:38:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 349 transitions. [2020-10-29 09:38:48,081 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 349 transitions. Word has length 298 [2020-10-29 09:38:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:48,081 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 349 transitions. [2020-10-29 09:38:48,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:38:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 349 transitions. [2020-10-29 09:38:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-29 09:38:48,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:48,084 INFO L422 BasicCegarLoop]: trace histogram [240, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:48,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:38:48,084 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:48,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1487298378, now seen corresponding path program 16 times [2020-10-29 09:38:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:48,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418989570] [2020-10-29 09:38:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:48,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:52,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:53,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:53,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-29 09:38:53,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:38:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-29 09:38:53,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:53,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:38:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:38:53,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-29 09:38:53,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:54,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:38:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:54,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:38:54,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:38:54,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:38:54,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:38:54,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:38:54,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:38:54,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:38:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:38:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:38:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:38:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:38:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 35292 backedges. 0 proven. 33972 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2020-10-29 09:38:54,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418989570] [2020-10-29 09:38:54,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:38:54,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:38:54,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859737621] [2020-10-29 09:38:54,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:38:54,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:38:54,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:38:54,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:38:54,350 INFO L87 Difference]: Start difference. First operand 325 states and 349 transitions. Second operand 28 states. [2020-10-29 09:38:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:38:57,895 INFO L93 Difference]: Finished difference Result 369 states and 396 transitions. [2020-10-29 09:38:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:38:57,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 324 [2020-10-29 09:38:57,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:38:57,898 INFO L225 Difference]: With dead ends: 369 [2020-10-29 09:38:57,898 INFO L226 Difference]: Without dead ends: 363 [2020-10-29 09:38:57,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:38:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-29 09:38:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 351. [2020-10-29 09:38:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-29 09:38:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 377 transitions. [2020-10-29 09:38:57,972 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 377 transitions. Word has length 324 [2020-10-29 09:38:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:38:57,973 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 377 transitions. [2020-10-29 09:38:57,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:38:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 377 transitions. [2020-10-29 09:38:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-29 09:38:57,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:38:57,975 INFO L422 BasicCegarLoop]: trace histogram [260, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:38:57,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:38:57,975 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:38:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:38:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1099882838, now seen corresponding path program 17 times [2020-10-29 09:38:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:38:57,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008058893] [2020-10-29 09:38:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:38:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:38:58,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:02,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:03,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:03,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-29 09:39:03,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 340 [2020-10-29 09:39:03,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:04,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:04,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:04,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:04,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:04,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41431 backedges. 0 proven. 40001 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-29 09:39:04,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008058893] [2020-10-29 09:39:04,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:04,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:39:04,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460008767] [2020-10-29 09:39:04,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:39:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:39:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:39:04,392 INFO L87 Difference]: Start difference. First operand 351 states and 377 transitions. Second operand 30 states. [2020-10-29 09:39:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:08,408 INFO L93 Difference]: Finished difference Result 395 states and 424 transitions. [2020-10-29 09:39:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:39:08,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 350 [2020-10-29 09:39:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:08,411 INFO L225 Difference]: With dead ends: 395 [2020-10-29 09:39:08,411 INFO L226 Difference]: Without dead ends: 389 [2020-10-29 09:39:08,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:39:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-29 09:39:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 377. [2020-10-29 09:39:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-29 09:39:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 405 transitions. [2020-10-29 09:39:08,518 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 405 transitions. Word has length 350 [2020-10-29 09:39:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:08,518 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 405 transitions. [2020-10-29 09:39:08,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:39:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 405 transitions. [2020-10-29 09:39:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-10-29 09:39:08,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:08,521 INFO L422 BasicCegarLoop]: trace histogram [280, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:08,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:39:08,522 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash 362898954, now seen corresponding path program 18 times [2020-10-29 09:39:08,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:08,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363145225] [2020-10-29 09:39:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:08,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:13,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:13,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 386 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 366 [2020-10-29 09:39:13,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:14,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:14,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:14,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:14,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 48062 backedges. 0 proven. 46522 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2020-10-29 09:39:15,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363145225] [2020-10-29 09:39:15,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:15,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:39:15,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606987831] [2020-10-29 09:39:15,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:39:15,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:15,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:39:15,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:39:15,188 INFO L87 Difference]: Start difference. First operand 377 states and 405 transitions. Second operand 32 states. [2020-10-29 09:39:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:19,886 INFO L93 Difference]: Finished difference Result 421 states and 452 transitions. [2020-10-29 09:39:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:39:19,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 376 [2020-10-29 09:39:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:19,892 INFO L225 Difference]: With dead ends: 421 [2020-10-29 09:39:19,893 INFO L226 Difference]: Without dead ends: 415 [2020-10-29 09:39:19,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:39:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-10-29 09:39:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 403. [2020-10-29 09:39:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-29 09:39:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 433 transitions. [2020-10-29 09:39:19,992 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 433 transitions. Word has length 376 [2020-10-29 09:39:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:19,992 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 433 transitions. [2020-10-29 09:39:19,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:39:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 433 transitions. [2020-10-29 09:39:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-29 09:39:19,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:19,995 INFO L422 BasicCegarLoop]: trace histogram [300, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:19,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:39:19,996 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash -891472534, now seen corresponding path program 19 times [2020-10-29 09:39:19,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:19,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507550770] [2020-10-29 09:39:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:20,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:25,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 412 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 392 [2020-10-29 09:39:25,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:26,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:26,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:26,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:26,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:26,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:26,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 55185 backedges. 0 proven. 53535 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-29 09:39:26,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507550770] [2020-10-29 09:39:26,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:26,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:39:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186557088] [2020-10-29 09:39:26,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:39:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:26,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:39:26,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:39:26,835 INFO L87 Difference]: Start difference. First operand 403 states and 433 transitions. Second operand 34 states. [2020-10-29 09:39:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:32,067 INFO L93 Difference]: Finished difference Result 447 states and 480 transitions. [2020-10-29 09:39:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:39:32,067 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 402 [2020-10-29 09:39:32,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:32,070 INFO L225 Difference]: With dead ends: 447 [2020-10-29 09:39:32,071 INFO L226 Difference]: Without dead ends: 441 [2020-10-29 09:39:32,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:39:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-29 09:39:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 429. [2020-10-29 09:39:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-29 09:39:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 461 transitions. [2020-10-29 09:39:32,207 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 461 transitions. Word has length 402 [2020-10-29 09:39:32,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:32,208 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 461 transitions. [2020-10-29 09:39:32,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:39:32,208 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 461 transitions. [2020-10-29 09:39:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-29 09:39:32,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:32,212 INFO L422 BasicCegarLoop]: trace histogram [320, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:32,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:39:32,213 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:32,214 INFO L82 PathProgramCache]: Analyzing trace with hash 659197130, now seen corresponding path program 20 times [2020-10-29 09:39:32,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:32,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936012599] [2020-10-29 09:39:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 438 [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:37,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:39:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:37,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 418 [2020-10-29 09:39:37,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:38,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:39,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:39,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:39,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:39,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:39,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:39,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:39,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:39,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 62800 backedges. 0 proven. 61040 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2020-10-29 09:39:39,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936012599] [2020-10-29 09:39:39,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:39,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:39:39,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156673886] [2020-10-29 09:39:39,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:39:39,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:39:39,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:39:39,339 INFO L87 Difference]: Start difference. First operand 429 states and 461 transitions. Second operand 36 states. [2020-10-29 09:39:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:45,287 INFO L93 Difference]: Finished difference Result 473 states and 508 transitions. [2020-10-29 09:39:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:39:45,287 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 428 [2020-10-29 09:39:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:45,289 INFO L225 Difference]: With dead ends: 473 [2020-10-29 09:39:45,289 INFO L226 Difference]: Without dead ends: 467 [2020-10-29 09:39:45,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:39:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-10-29 09:39:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 455. [2020-10-29 09:39:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-29 09:39:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 489 transitions. [2020-10-29 09:39:45,433 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 489 transitions. Word has length 428 [2020-10-29 09:39:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:45,434 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 489 transitions. [2020-10-29 09:39:45,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:39:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 489 transitions. [2020-10-29 09:39:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-10-29 09:39:45,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:45,439 INFO L422 BasicCegarLoop]: trace histogram [340, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:45,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:39:45,439 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:45,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1332777942, now seen corresponding path program 21 times [2020-10-29 09:39:45,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:45,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303394028] [2020-10-29 09:39:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:46,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:50,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:50,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 464 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 444 [2020-10-29 09:39:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:39:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:52,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:39:52,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:39:52,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:39:52,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:39:52,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:39:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 70907 backedges. 0 proven. 69037 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2020-10-29 09:39:52,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303394028] [2020-10-29 09:39:52,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:39:52,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:39:52,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543328978] [2020-10-29 09:39:52,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:39:52,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:39:52,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:39:52,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:39:52,767 INFO L87 Difference]: Start difference. First operand 455 states and 489 transitions. Second operand 38 states. [2020-10-29 09:39:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:39:59,266 INFO L93 Difference]: Finished difference Result 499 states and 536 transitions. [2020-10-29 09:39:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:39:59,267 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 454 [2020-10-29 09:39:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:39:59,269 INFO L225 Difference]: With dead ends: 499 [2020-10-29 09:39:59,269 INFO L226 Difference]: Without dead ends: 493 [2020-10-29 09:39:59,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:39:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-29 09:39:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 481. [2020-10-29 09:39:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-29 09:39:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 517 transitions. [2020-10-29 09:39:59,406 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 517 transitions. Word has length 454 [2020-10-29 09:39:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:39:59,407 INFO L481 AbstractCegarLoop]: Abstraction has 481 states and 517 transitions. [2020-10-29 09:39:59,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:39:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 517 transitions. [2020-10-29 09:39:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-10-29 09:39:59,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:39:59,411 INFO L422 BasicCegarLoop]: trace histogram [360, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:39:59,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:39:59,411 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:39:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:39:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1999514742, now seen corresponding path program 22 times [2020-10-29 09:39:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:39:59,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104099633] [2020-10-29 09:39:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:39:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:39:59,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:02,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:04,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:04,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 490 [2020-10-29 09:40:04,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:40:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-29 09:40:04,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:04,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:04,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:40:04,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:04,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 470 [2020-10-29 09:40:04,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:06,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:06,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:06,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:06,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:06,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:06,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:06,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:06,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 79506 backedges. 0 proven. 77526 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-10-29 09:40:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104099633] [2020-10-29 09:40:06,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:06,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:40:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826305392] [2020-10-29 09:40:06,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:40:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:06,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:40:06,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:40:06,888 INFO L87 Difference]: Start difference. First operand 481 states and 517 transitions. Second operand 40 states. [2020-10-29 09:40:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:40:14,229 INFO L93 Difference]: Finished difference Result 525 states and 564 transitions. [2020-10-29 09:40:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:40:14,230 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 480 [2020-10-29 09:40:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:40:14,232 INFO L225 Difference]: With dead ends: 525 [2020-10-29 09:40:14,233 INFO L226 Difference]: Without dead ends: 519 [2020-10-29 09:40:14,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:40:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-29 09:40:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 507. [2020-10-29 09:40:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-29 09:40:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 545 transitions. [2020-10-29 09:40:14,362 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 545 transitions. Word has length 480 [2020-10-29 09:40:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:40:14,363 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 545 transitions. [2020-10-29 09:40:14,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:40:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 545 transitions. [2020-10-29 09:40:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-10-29 09:40:14,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:40:14,367 INFO L422 BasicCegarLoop]: trace histogram [380, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:40:14,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:40:14,367 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:40:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:40:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash -826817814, now seen corresponding path program 23 times [2020-10-29 09:40:14,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:40:14,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557494273] [2020-10-29 09:40:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:40:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:14,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:19,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:19,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 516 [2020-10-29 09:40:19,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:19,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5084 [2020-10-29 09:40:19,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:19,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:19,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:40:19,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:40:19,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 496 [2020-10-29 09:40:19,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:21,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:40:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:40:21,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:40:21,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:40:21,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:40:21,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:40:21,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:40:21,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:40:21,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:40:21,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:40:21,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:40:21,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:40:21,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:40:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 88597 backedges. 0 proven. 86507 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2020-10-29 09:40:22,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557494273] [2020-10-29 09:40:22,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:40:22,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:40:22,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146567747] [2020-10-29 09:40:22,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:40:22,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:40:22,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:40:22,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:40:22,023 INFO L87 Difference]: Start difference. First operand 507 states and 545 transitions. Second operand 42 states.