/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:10:08,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:10:08,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:10:08,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:10:08,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:10:08,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:10:08,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:10:08,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:10:08,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:10:08,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:10:08,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:10:08,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:10:08,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:10:08,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:10:08,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:10:08,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:10:08,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:10:08,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:10:08,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:10:08,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:10:08,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:10:08,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:10:08,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:10:08,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:10:08,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:10:08,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:10:08,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:10:08,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:10:08,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:10:08,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:10:08,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:10:08,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:10:08,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:10:08,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:10:08,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:10:08,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:10:08,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:10:08,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:10:08,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:10:08,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:10:08,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:10:08,286 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 [2020-10-26 19:10:08,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:10:08,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:10:08,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:10:08,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:10:08,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:10:08,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:10:08,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:10:08,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:10:08,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:10:08,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:10:08,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:10:08,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:10:08,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:10:08,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:10:08,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:10:08,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:10:08,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:10:08,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:10:08,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:10:08,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:10:08,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:10:08,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:10:08,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:10:08,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:10:08,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:10:08,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:10:08,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:10:08,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:10:08,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:10:08,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:10:08,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:10:08,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:10:08,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:10:08,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:10:08,839 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:10:08,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-26 19:10:08,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fe0e3501/a862488fefc34734993699221a068c7a/FLAG4f1a8bd96 [2020-10-26 19:10:09,713 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:10:09,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-26 19:10:09,724 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fe0e3501/a862488fefc34734993699221a068c7a/FLAG4f1a8bd96 [2020-10-26 19:10:10,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fe0e3501/a862488fefc34734993699221a068c7a [2020-10-26 19:10:10,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:10:10,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:10:10,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:10:10,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:10:10,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:10:10,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ddc5653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10, skipping insertion in model container [2020-10-26 19:10:10,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:10:10,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:10:10,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:10:10,295 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:10:10,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:10:10,336 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:10:10,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10 WrapperNode [2020-10-26 19:10:10,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:10:10,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:10:10,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:10:10,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:10:10,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (1/1) ... [2020-10-26 19:10:10,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:10:10,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:10:10,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:10:10,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:10:10,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (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 [2020-10-26 19:10:10,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:10:10,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:10:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:10:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:10:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:10:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:10:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:10:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:10:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:10:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:10:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:10:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:10:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:10:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:10:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:10:10,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:10:10,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:10:10,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:10:10,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:10:10,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:10:11,260 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:10:11,260 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:10:11,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:10:11 BoogieIcfgContainer [2020-10-26 19:10:11,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:10:11,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:10:11,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:10:11,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:10:11,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:10:10" (1/3) ... [2020-10-26 19:10:11,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410fa022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:10:11, skipping insertion in model container [2020-10-26 19:10:11,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:10" (2/3) ... [2020-10-26 19:10:11,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410fa022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:10:11, skipping insertion in model container [2020-10-26 19:10:11,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:10:11" (3/3) ... [2020-10-26 19:10:11,272 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2020-10-26 19:10:11,285 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:10:11,291 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:10:11,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:10:11,352 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:10:11,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:10:11,352 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:10:11,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:10:11,352 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:10:11,352 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:10:11,353 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:10:11,353 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:10:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-26 19:10:11,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:10:11,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:11,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:11,386 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 820387366, now seen corresponding path program 1 times [2020-10-26 19:10:11,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:11,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705155971] [2020-10-26 19:10:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:11,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:11,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:11,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:12,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:10:12,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:12,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-26 19:10:12,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:12,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:12,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:10:12,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:12,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:12,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:12,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:10:12,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:12,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:12,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:12,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:12,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:12,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705155971] [2020-10-26 19:10:12,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:10:12,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:10:12,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663513830] [2020-10-26 19:10:12,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:10:12,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:12,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:10:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:10:12,470 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-26 19:10:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:12,601 INFO L93 Difference]: Finished difference Result 73 states and 102 transitions. [2020-10-26 19:10:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:10:12,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-26 19:10:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:12,613 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:10:12,613 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:10:12,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:10:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:10:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-26 19:10:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:10:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-26 19:10:12,665 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2020-10-26 19:10:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:12,666 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-26 19:10:12,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:10:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-26 19:10:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:10:12,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:12,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:12,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:10:12,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1435305744, now seen corresponding path program 1 times [2020-10-26 19:10:12,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:12,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150594338] [2020-10-26 19:10:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:12,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:13,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:10:13,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:13,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-26 19:10:13,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:10:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:10:13,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:13,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:13,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:13,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:13,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:13,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:10:13,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:13,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:13,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:13,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:10:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:13,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150594338] [2020-10-26 19:10:13,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:10:13,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:10:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272608827] [2020-10-26 19:10:13,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:10:13,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:10:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:10:13,460 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-10-26 19:10:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:13,636 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-10-26 19:10:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:10:13,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-26 19:10:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:13,638 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:10:13,638 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:10:13,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:10:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:10:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:10:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:10:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-26 19:10:13,650 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 19 [2020-10-26 19:10:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:13,650 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-26 19:10:13,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:10:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-26 19:10:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:10:13,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:13,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:13,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:10:13,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash -995728978, now seen corresponding path program 1 times [2020-10-26 19:10:13,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:13,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588118769] [2020-10-26 19:10:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:13,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:14,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:10:14,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:14,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-26 19:10:14,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:10:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:14,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:10:14,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:14,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:14,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:14,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:10:14,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:14,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:14,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:14,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:14,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588118769] [2020-10-26 19:10:14,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:14,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:10:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183135117] [2020-10-26 19:10:14,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:10:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:14,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:10:14,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:14,404 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 5 states. [2020-10-26 19:10:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:14,567 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-10-26 19:10:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:10:14,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-26 19:10:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:14,569 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:10:14,569 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:10:14,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:10:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:10:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:10:14,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-26 19:10:14,588 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 21 [2020-10-26 19:10:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-26 19:10:14,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:10:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-26 19:10:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:10:14,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:14,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:14,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:10:14,592 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:14,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:14,592 INFO L82 PathProgramCache]: Analyzing trace with hash -757887796, now seen corresponding path program 2 times [2020-10-26 19:10:14,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:14,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928395522] [2020-10-26 19:10:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:14,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:15,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:15,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:10:15,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-26 19:10:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:10:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:15,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:10:15,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:15,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:15,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:15,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:15,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:15,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:10:15,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:10:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:15,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928395522] [2020-10-26 19:10:15,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:15,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:10:15,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264215006] [2020-10-26 19:10:15,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:10:15,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:10:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:10:15,992 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 6 states. [2020-10-26 19:10:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:16,180 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-10-26 19:10:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:10:16,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-26 19:10:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:16,182 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:10:16,182 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:10:16,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:10:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:10:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-26 19:10:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:10:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-26 19:10:16,191 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2020-10-26 19:10:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:16,191 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-26 19:10:16,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:10:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-26 19:10:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:10:16,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:16,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:16,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:10:16,193 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 328547467, now seen corresponding path program 1 times [2020-10-26 19:10:16,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:16,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861481256] [2020-10-26 19:10:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:16,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:18,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:18,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:10:18,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:18,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2579 [2020-10-26 19:10:18,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:10:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:18,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:10:18,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:18,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:18,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:18,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:18,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:18,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:18,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:18,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:18,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:18,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:10:18,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861481256] [2020-10-26 19:10:18,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:18,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:10:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490438548] [2020-10-26 19:10:18,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:10:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:10:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:10:18,861 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 7 states. [2020-10-26 19:10:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:19,015 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-10-26 19:10:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:10:19,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-26 19:10:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:19,017 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:10:19,017 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:10:19,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:10:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:10:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-26 19:10:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:10:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2020-10-26 19:10:19,026 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 28 [2020-10-26 19:10:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:19,026 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2020-10-26 19:10:19,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:10:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2020-10-26 19:10:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:10:19,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:19,028 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:19,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:10:19,028 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1548830312, now seen corresponding path program 2 times [2020-10-26 19:10:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:19,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522034503] [2020-10-26 19:10:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:19,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:19,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:24,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:10:24,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:24,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:10:24,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:24,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:10:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:24,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:10:24,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:24,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:24,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:24,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:24,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:10:24,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:24,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:10:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:10:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522034503] [2020-10-26 19:10:24,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:24,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:10:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175171477] [2020-10-26 19:10:24,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:10:24,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:24,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:10:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:10:24,154 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 8 states. [2020-10-26 19:10:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:24,346 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2020-10-26 19:10:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:10:24,347 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-26 19:10:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:24,348 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:10:24,348 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:10:24,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:10:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:10:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-26 19:10:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:10:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-10-26 19:10:24,364 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 33 [2020-10-26 19:10:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:24,364 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-10-26 19:10:24,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:10:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-10-26 19:10:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:10:24,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:24,369 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:24,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:10:24,370 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash -648008977, now seen corresponding path program 3 times [2020-10-26 19:10:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:24,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500179443] [2020-10-26 19:10:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:29,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:10:29,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:10:29,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:29,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:29,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:29,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:29,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:29,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:29,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:29,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:29,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:10:29,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500179443] [2020-10-26 19:10:29,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:29,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:10:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778109253] [2020-10-26 19:10:29,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:10:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:10:29,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:10:29,516 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 9 states. [2020-10-26 19:10:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:29,693 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-26 19:10:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:10:29,693 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-26 19:10:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:29,694 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:10:29,694 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:10:29,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:10:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:10:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-26 19:10:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:10:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-26 19:10:29,703 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 38 [2020-10-26 19:10:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:29,703 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-26 19:10:29,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:10:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-26 19:10:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:10:29,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:29,704 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:29,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:10:29,705 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:29,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:29,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1086005252, now seen corresponding path program 4 times [2020-10-26 19:10:29,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:29,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715348135] [2020-10-26 19:10:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:29,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:34,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:34,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:10:34,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:34,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:10:34,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:34,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:10:34,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:34,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:34,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:34,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:34,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:34,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:34,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:10:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:10:34,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715348135] [2020-10-26 19:10:34,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:34,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:34,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376813408] [2020-10-26 19:10:34,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:34,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:34,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:34,847 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 10 states. [2020-10-26 19:10:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:35,063 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2020-10-26 19:10:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:10:35,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-26 19:10:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:35,064 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:10:35,065 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:10:35,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:10:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-26 19:10:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:10:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-26 19:10:35,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 43 [2020-10-26 19:10:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:35,079 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-26 19:10:35,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-26 19:10:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:10:35,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:35,084 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:35,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:10:35,084 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2022971731, now seen corresponding path program 5 times [2020-10-26 19:10:35,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:35,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878583676] [2020-10-26 19:10:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:35,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:35,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:40,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:40,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:10:40,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:40,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:10:40,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:10:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:40,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:10:40,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:40,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:40,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:40,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:40,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:40,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:40,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:40,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:40,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:10:40,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878583676] [2020-10-26 19:10:40,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:40,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:10:40,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797687367] [2020-10-26 19:10:40,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:10:40,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:10:40,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:10:40,252 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 11 states. [2020-10-26 19:10:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:40,424 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-10-26 19:10:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:10:40,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-26 19:10:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:40,426 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:10:40,426 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:10:40,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:10:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:10:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-26 19:10:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:10:40,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2020-10-26 19:10:40,442 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 48 [2020-10-26 19:10:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:40,442 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2020-10-26 19:10:40,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:10:40,442 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2020-10-26 19:10:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:10:40,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:40,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:40,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:10:40,449 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:40,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:40,450 INFO L82 PathProgramCache]: Analyzing trace with hash -897132128, now seen corresponding path program 6 times [2020-10-26 19:10:40,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:40,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102067147] [2020-10-26 19:10:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:40,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:41,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:45,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:10:45,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:45,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:10:45,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:10:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:45,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:10:45,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:45,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:45,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:45,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:45,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:45,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:10:45,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:45,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:10:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102067147] [2020-10-26 19:10:45,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:45,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:10:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418167236] [2020-10-26 19:10:45,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:10:45,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:10:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:10:45,628 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 12 states. [2020-10-26 19:10:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:46,024 INFO L93 Difference]: Finished difference Result 127 states and 168 transitions. [2020-10-26 19:10:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:10:46,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-26 19:10:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:46,026 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:10:46,026 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:10:46,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:10:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:10:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-26 19:10:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:10:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2020-10-26 19:10:46,034 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 53 [2020-10-26 19:10:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:46,035 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2020-10-26 19:10:46,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:10:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2020-10-26 19:10:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:10:46,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:46,036 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:46,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:10:46,036 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:46,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1023100855, now seen corresponding path program 7 times [2020-10-26 19:10:46,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:46,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892729950] [2020-10-26 19:10:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:46,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:47,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:51,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:51,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:10:51,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:10:51,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:10:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:10:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:51,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:51,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:51,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:51,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:51,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:10:51,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:10:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892729950] [2020-10-26 19:10:51,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:51,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:10:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439299129] [2020-10-26 19:10:51,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:10:51,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:10:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:10:51,254 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 13 states. [2020-10-26 19:10:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:51,483 INFO L93 Difference]: Finished difference Result 137 states and 182 transitions. [2020-10-26 19:10:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:10:51,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-26 19:10:51,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:51,485 INFO L225 Difference]: With dead ends: 137 [2020-10-26 19:10:51,485 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:10:51,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:10:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:10:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-26 19:10:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:10:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-10-26 19:10:51,497 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 58 [2020-10-26 19:10:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:51,498 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-10-26 19:10:51,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:10:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-10-26 19:10:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:10:51,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:51,499 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:51,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:10:51,499 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash 514470716, now seen corresponding path program 8 times [2020-10-26 19:10:51,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:51,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804490972] [2020-10-26 19:10:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:51,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:56,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:56,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:10:56,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:56,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:10:56,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:56,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:10:56,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:10:56,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:10:56,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:56,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:56,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:56,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:56,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:56,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:10:56,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:10:56,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804490972] [2020-10-26 19:10:56,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:56,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:10:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295952723] [2020-10-26 19:10:56,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:10:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:10:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:10:56,721 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 14 states. [2020-10-26 19:10:57,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:57,049 INFO L93 Difference]: Finished difference Result 147 states and 196 transitions. [2020-10-26 19:10:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:10:57,050 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-26 19:10:57,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:57,051 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:10:57,051 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:10:57,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:10:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:10:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-10-26 19:10:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:10:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2020-10-26 19:10:57,072 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 63 [2020-10-26 19:10:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:57,072 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2020-10-26 19:10:57,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:10:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2020-10-26 19:10:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:10:57,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:57,073 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:57,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:10:57,074 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1981811173, now seen corresponding path program 9 times [2020-10-26 19:10:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:57,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090393364] [2020-10-26 19:10:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:57,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:59,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:02,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:11:02,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:02,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:02,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:02,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:02,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:02,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:02,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:02,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:02,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:02,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:02,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:11:02,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090393364] [2020-10-26 19:11:02,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:02,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:11:02,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991655908] [2020-10-26 19:11:02,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:11:02,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:11:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:11:02,312 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand 15 states. [2020-10-26 19:11:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:02,611 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2020-10-26 19:11:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:11:02,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-26 19:11:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:02,613 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:11:02,613 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:11:02,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:11:02,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:11:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-26 19:11:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:11:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-10-26 19:11:02,626 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 68 [2020-10-26 19:11:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:02,627 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-10-26 19:11:02,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:11:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-10-26 19:11:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:11:02,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:02,628 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:02,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:11:02,628 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1486548184, now seen corresponding path program 10 times [2020-10-26 19:11:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:02,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557483403] [2020-10-26 19:11:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:02,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:05,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:07,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:07,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:11:07,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:11:07,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:11:07,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:07,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:11:07,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:07,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:11:07,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:11:07,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:07,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:07,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:07,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:07,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:07,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:07,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:07,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:07,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:07,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:07,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:11:07,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557483403] [2020-10-26 19:11:07,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:07,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:11:07,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923537632] [2020-10-26 19:11:07,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:11:07,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:07,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:11:07,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:11:07,921 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 16 states. [2020-10-26 19:11:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:08,232 INFO L93 Difference]: Finished difference Result 167 states and 224 transitions. [2020-10-26 19:11:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:11:08,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-26 19:11:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:08,234 INFO L225 Difference]: With dead ends: 167 [2020-10-26 19:11:08,234 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:11:08,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:11:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:11:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-26 19:11:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:11:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2020-10-26 19:11:08,246 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 73 [2020-10-26 19:11:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:08,246 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2020-10-26 19:11:08,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:11:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2020-10-26 19:11:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:11:08,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:08,249 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:08,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:11:08,252 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1106484097, now seen corresponding path program 11 times [2020-10-26 19:11:08,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:08,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568289506] [2020-10-26 19:11:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:08,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:12,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:13,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:13,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:11:13,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:11:13,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:11:13,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:11:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:13,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:11:13,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:13,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:13,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:13,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:13,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:13,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:13,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-26 19:11:13,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568289506] [2020-10-26 19:11:13,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:13,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:11:13,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345080387] [2020-10-26 19:11:13,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:11:13,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:11:13,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:11:13,554 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand 17 states. [2020-10-26 19:11:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:13,997 INFO L93 Difference]: Finished difference Result 177 states and 238 transitions. [2020-10-26 19:11:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:11:13,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-10-26 19:11:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:13,999 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:11:14,000 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:11:14,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:11:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:11:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-10-26 19:11:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:11:14,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2020-10-26 19:11:14,015 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 78 [2020-10-26 19:11:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:14,016 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2020-10-26 19:11:14,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:11:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2020-10-26 19:11:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:11:14,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:14,017 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:14,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:11:14,017 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1504786828, now seen corresponding path program 12 times [2020-10-26 19:11:14,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:14,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563755833] [2020-10-26 19:11:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:14,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:14,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:18,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:19,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:19,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:11:19,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:11:19,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:11:19,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:11:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:19,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:11:19,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:19,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:19,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:19,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:19,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:19,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:19,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:19,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:19,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:19,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:19,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:19,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:11:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:11:19,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563755833] [2020-10-26 19:11:19,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:19,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:11:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217555698] [2020-10-26 19:11:19,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:11:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:11:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:11:19,350 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand 18 states. [2020-10-26 19:11:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:19,801 INFO L93 Difference]: Finished difference Result 187 states and 252 transitions. [2020-10-26 19:11:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:11:19,802 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-26 19:11:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:19,803 INFO L225 Difference]: With dead ends: 187 [2020-10-26 19:11:19,803 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:11:19,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:11:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:11:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2020-10-26 19:11:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:11:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2020-10-26 19:11:19,810 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 83 [2020-10-26 19:11:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:19,811 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2020-10-26 19:11:19,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:11:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2020-10-26 19:11:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:11:19,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:19,815 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:19,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:11:19,816 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash 399168227, now seen corresponding path program 13 times [2020-10-26 19:11:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:19,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42533202] [2020-10-26 19:11:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:19,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:19,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:24,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:24,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:11:24,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:24,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:11:24,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:11:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:24,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:11:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:25,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:25,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:25,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:25,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:25,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:25,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:25,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:25,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:25,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-26 19:11:25,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42533202] [2020-10-26 19:11:25,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:25,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:11:25,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191960222] [2020-10-26 19:11:25,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:11:25,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:11:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:11:25,110 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand 19 states. [2020-10-26 19:11:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:25,459 INFO L93 Difference]: Finished difference Result 197 states and 266 transitions. [2020-10-26 19:11:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:11:25,460 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-10-26 19:11:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:25,461 INFO L225 Difference]: With dead ends: 197 [2020-10-26 19:11:25,462 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:11:25,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:11:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:11:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2020-10-26 19:11:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:11:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2020-10-26 19:11:25,471 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 88 [2020-10-26 19:11:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:25,472 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2020-10-26 19:11:25,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:11:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2020-10-26 19:11:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:11:25,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:25,473 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:25,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:11:25,473 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1681621008, now seen corresponding path program 14 times [2020-10-26 19:11:25,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:25,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248039505] [2020-10-26 19:11:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:25,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:30,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:11:30,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:30,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:30,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:30,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:30,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:30,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:30,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:30,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:30,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:30,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:30,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-26 19:11:30,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248039505] [2020-10-26 19:11:30,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:30,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:11:30,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081449868] [2020-10-26 19:11:30,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:11:30,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:11:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:11:30,839 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand 20 states. [2020-10-26 19:11:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:31,209 INFO L93 Difference]: Finished difference Result 207 states and 280 transitions. [2020-10-26 19:11:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:11:31,209 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-26 19:11:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:31,211 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:11:31,211 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:11:31,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:11:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:11:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2020-10-26 19:11:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:11:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2020-10-26 19:11:31,218 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 93 [2020-10-26 19:11:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:31,219 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2020-10-26 19:11:31,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:11:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2020-10-26 19:11:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:11:31,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:31,220 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:31,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:11:31,221 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1729789625, now seen corresponding path program 15 times [2020-10-26 19:11:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:31,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870486028] [2020-10-26 19:11:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:31,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:31,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:11:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:36,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:36,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:36,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:36,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:36,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:36,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:36,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:11:36,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870486028] [2020-10-26 19:11:36,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:36,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:11:36,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876699742] [2020-10-26 19:11:36,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:11:36,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:36,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:11:36,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:11:36,584 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand 21 states. [2020-10-26 19:11:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:36,927 INFO L93 Difference]: Finished difference Result 217 states and 294 transitions. [2020-10-26 19:11:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:11:36,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:11:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:36,929 INFO L225 Difference]: With dead ends: 217 [2020-10-26 19:11:36,929 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:11:36,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:11:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:11:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2020-10-26 19:11:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:11:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 168 transitions. [2020-10-26 19:11:36,940 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 168 transitions. Word has length 98 [2020-10-26 19:11:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:36,940 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 168 transitions. [2020-10-26 19:11:36,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:11:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 168 transitions. [2020-10-26 19:11:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:11:36,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:36,941 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:36,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:11:36,942 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash 961993132, now seen corresponding path program 16 times [2020-10-26 19:11:36,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:36,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997208107] [2020-10-26 19:11:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:36,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:37,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:41,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:41,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:11:41,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:42,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:42,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:42,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:42,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:42,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:42,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:42,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-26 19:11:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997208107] [2020-10-26 19:11:42,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:42,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:11:42,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69287105] [2020-10-26 19:11:42,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:11:42,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:42,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:11:42,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:11:42,338 INFO L87 Difference]: Start difference. First operand 130 states and 168 transitions. Second operand 22 states. [2020-10-26 19:11:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:42,741 INFO L93 Difference]: Finished difference Result 227 states and 308 transitions. [2020-10-26 19:11:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:11:42,742 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-10-26 19:11:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:42,744 INFO L225 Difference]: With dead ends: 227 [2020-10-26 19:11:42,744 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:11:42,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:11:42,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:11:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2020-10-26 19:11:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-26 19:11:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2020-10-26 19:11:42,759 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 103 [2020-10-26 19:11:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:42,759 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2020-10-26 19:11:42,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:11:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2020-10-26 19:11:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:11:42,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:42,761 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:42,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:11:42,765 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash -358174805, now seen corresponding path program 17 times [2020-10-26 19:11:42,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:42,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34599125] [2020-10-26 19:11:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:42,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:42,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:47,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:47,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:11:47,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:47,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:11:47,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:11:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:11:47,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:48,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:48,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:48,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:48,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:48,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:48,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:48,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:11:48,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34599125] [2020-10-26 19:11:48,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:48,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:11:48,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846697706] [2020-10-26 19:11:48,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:11:48,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:11:48,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:11:48,219 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand 23 states. [2020-10-26 19:11:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:48,628 INFO L93 Difference]: Finished difference Result 237 states and 322 transitions. [2020-10-26 19:11:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:11:48,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-10-26 19:11:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:48,631 INFO L225 Difference]: With dead ends: 237 [2020-10-26 19:11:48,631 INFO L226 Difference]: Without dead ends: 146 [2020-10-26 19:11:48,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:11:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-26 19:11:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-10-26 19:11:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:11:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 184 transitions. [2020-10-26 19:11:48,643 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 184 transitions. Word has length 108 [2020-10-26 19:11:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:48,643 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 184 transitions. [2020-10-26 19:11:48,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:11:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 184 transitions. [2020-10-26 19:11:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:11:48,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:48,644 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:48,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:11:48,645 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash 857117512, now seen corresponding path program 18 times [2020-10-26 19:11:48,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:48,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632605707] [2020-10-26 19:11:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:53,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:11:53,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:54,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:54,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:54,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-26 19:11:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632605707] [2020-10-26 19:11:54,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:54,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:11:54,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952595254] [2020-10-26 19:11:54,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:11:54,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:54,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:11:54,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:11:54,141 INFO L87 Difference]: Start difference. First operand 142 states and 184 transitions. Second operand 24 states. [2020-10-26 19:11:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:54,658 INFO L93 Difference]: Finished difference Result 247 states and 336 transitions. [2020-10-26 19:11:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:11:54,660 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-10-26 19:11:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:54,662 INFO L225 Difference]: With dead ends: 247 [2020-10-26 19:11:54,662 INFO L226 Difference]: Without dead ends: 152 [2020-10-26 19:11:54,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:11:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-26 19:11:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2020-10-26 19:11:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-26 19:11:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 192 transitions. [2020-10-26 19:11:54,670 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 192 transitions. Word has length 113 [2020-10-26 19:11:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:54,670 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 192 transitions. [2020-10-26 19:11:54,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:11:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 192 transitions. [2020-10-26 19:11:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:11:54,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:54,672 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:54,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:11:54,672 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1104715279, now seen corresponding path program 19 times [2020-10-26 19:11:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:54,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585583414] [2020-10-26 19:11:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:11:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:11:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:11:59,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:00,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:00,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:00,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:00,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:00,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:12:00,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:00,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:00,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:00,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:00,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-26 19:12:00,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585583414] [2020-10-26 19:12:00,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:00,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:12:00,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506524101] [2020-10-26 19:12:00,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:12:00,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:12:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:12:00,176 INFO L87 Difference]: Start difference. First operand 148 states and 192 transitions. Second operand 25 states. [2020-10-26 19:12:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:00,633 INFO L93 Difference]: Finished difference Result 257 states and 350 transitions. [2020-10-26 19:12:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:12:00,634 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 118 [2020-10-26 19:12:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:00,636 INFO L225 Difference]: With dead ends: 257 [2020-10-26 19:12:00,636 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:12:00,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:12:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:12:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2020-10-26 19:12:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-26 19:12:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 200 transitions. [2020-10-26 19:12:00,644 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 200 transitions. Word has length 118 [2020-10-26 19:12:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:00,645 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 200 transitions. [2020-10-26 19:12:00,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:12:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 200 transitions. [2020-10-26 19:12:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:12:00,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:00,646 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:00,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:12:00,647 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash -512725788, now seen corresponding path program 20 times [2020-10-26 19:12:00,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:00,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063403608] [2020-10-26 19:12:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:00,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:05,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:05,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:12:05,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:12:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:12:05,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:12:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:12:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:06,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:06,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:06,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:06,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:06,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:12:06,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:06,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:06,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-26 19:12:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063403608] [2020-10-26 19:12:06,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:06,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:12:06,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739614942] [2020-10-26 19:12:06,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:12:06,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:06,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:12:06,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:12:06,191 INFO L87 Difference]: Start difference. First operand 154 states and 200 transitions. Second operand 26 states. [2020-10-26 19:12:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:06,669 INFO L93 Difference]: Finished difference Result 267 states and 364 transitions. [2020-10-26 19:12:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:12:06,670 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2020-10-26 19:12:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:06,673 INFO L225 Difference]: With dead ends: 267 [2020-10-26 19:12:06,673 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:12:06,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:12:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:12:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2020-10-26 19:12:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-26 19:12:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 208 transitions. [2020-10-26 19:12:06,682 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 208 transitions. Word has length 123 [2020-10-26 19:12:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:06,682 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 208 transitions. [2020-10-26 19:12:06,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:12:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 208 transitions. [2020-10-26 19:12:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:12:06,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:06,684 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:06,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:12:06,684 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1120242803, now seen corresponding path program 21 times [2020-10-26 19:12:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:06,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303088425] [2020-10-26 19:12:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:06,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:07,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:11,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:11,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:12:11,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:12,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:12,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:12,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:12,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:12,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:12:12,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:12,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:12,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:12,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:12,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-26 19:12:12,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303088425] [2020-10-26 19:12:12,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:12,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:12:12,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838675237] [2020-10-26 19:12:12,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:12:12,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:12:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:12:12,291 INFO L87 Difference]: Start difference. First operand 160 states and 208 transitions. Second operand 27 states. [2020-10-26 19:12:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:12,744 INFO L93 Difference]: Finished difference Result 277 states and 378 transitions. [2020-10-26 19:12:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:12:12,745 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 128 [2020-10-26 19:12:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:12,747 INFO L225 Difference]: With dead ends: 277 [2020-10-26 19:12:12,747 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:12:12,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:12:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:12:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2020-10-26 19:12:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-26 19:12:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 216 transitions. [2020-10-26 19:12:12,755 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 216 transitions. Word has length 128 [2020-10-26 19:12:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:12,755 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 216 transitions. [2020-10-26 19:12:12,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:12:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 216 transitions. [2020-10-26 19:12:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:12:12,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:12,757 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:12,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:12:12,758 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:12,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:12,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1926899328, now seen corresponding path program 22 times [2020-10-26 19:12:12,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:12,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159259272] [2020-10-26 19:12:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:12,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:16,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:17,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:17,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:12:17,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:17,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:12:17,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:17,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:12:17,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:17,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:12:17,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:18,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:18,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:18,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:18,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:12:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-26 19:12:18,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159259272] [2020-10-26 19:12:18,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:18,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:12:18,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333350471] [2020-10-26 19:12:18,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:12:18,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:12:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:12:18,351 INFO L87 Difference]: Start difference. First operand 166 states and 216 transitions. Second operand 28 states. [2020-10-26 19:12:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:18,918 INFO L93 Difference]: Finished difference Result 287 states and 392 transitions. [2020-10-26 19:12:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:12:18,919 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 133 [2020-10-26 19:12:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:18,921 INFO L225 Difference]: With dead ends: 287 [2020-10-26 19:12:18,921 INFO L226 Difference]: Without dead ends: 176 [2020-10-26 19:12:18,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:12:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-26 19:12:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2020-10-26 19:12:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-26 19:12:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 224 transitions. [2020-10-26 19:12:18,930 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 224 transitions. Word has length 133 [2020-10-26 19:12:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:18,931 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 224 transitions. [2020-10-26 19:12:18,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:12:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 224 transitions. [2020-10-26 19:12:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:12:18,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:18,933 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:18,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:12:18,933 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash -449332521, now seen corresponding path program 23 times [2020-10-26 19:12:18,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:18,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812906978] [2020-10-26 19:12:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:18,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:19,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:24,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:12:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:24,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:24,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:24,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:24,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:24,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:24,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:24,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:24,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:24,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:24,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-26 19:12:24,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812906978] [2020-10-26 19:12:24,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:24,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:12:24,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941378840] [2020-10-26 19:12:24,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:12:24,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:24,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:12:24,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:12:24,611 INFO L87 Difference]: Start difference. First operand 172 states and 224 transitions. Second operand 29 states. [2020-10-26 19:12:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:25,187 INFO L93 Difference]: Finished difference Result 297 states and 406 transitions. [2020-10-26 19:12:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:12:25,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 138 [2020-10-26 19:12:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:25,189 INFO L225 Difference]: With dead ends: 297 [2020-10-26 19:12:25,189 INFO L226 Difference]: Without dead ends: 182 [2020-10-26 19:12:25,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:12:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-26 19:12:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2020-10-26 19:12:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:12:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 232 transitions. [2020-10-26 19:12:25,200 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 232 transitions. Word has length 138 [2020-10-26 19:12:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:25,201 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 232 transitions. [2020-10-26 19:12:25,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:12:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 232 transitions. [2020-10-26 19:12:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-26 19:12:25,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:25,204 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:25,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:12:25,204 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash -800489444, now seen corresponding path program 24 times [2020-10-26 19:12:25,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:25,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176082485] [2020-10-26 19:12:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:26,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:12:30,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:30,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:12:30,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:30,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:30,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:30,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:30,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:30,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:30,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:30,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:30,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-26 19:12:30,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176082485] [2020-10-26 19:12:30,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:30,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:12:30,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649313953] [2020-10-26 19:12:30,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:12:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:12:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:12:30,962 INFO L87 Difference]: Start difference. First operand 178 states and 232 transitions. Second operand 30 states. [2020-10-26 19:12:31,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:31,479 INFO L93 Difference]: Finished difference Result 307 states and 420 transitions. [2020-10-26 19:12:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:12:31,480 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 143 [2020-10-26 19:12:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:31,482 INFO L225 Difference]: With dead ends: 307 [2020-10-26 19:12:31,482 INFO L226 Difference]: Without dead ends: 188 [2020-10-26 19:12:31,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:12:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-26 19:12:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2020-10-26 19:12:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-26 19:12:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 240 transitions. [2020-10-26 19:12:31,490 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 240 transitions. Word has length 143 [2020-10-26 19:12:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:31,490 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 240 transitions. [2020-10-26 19:12:31,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:12:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 240 transitions. [2020-10-26 19:12:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-26 19:12:31,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:31,492 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:31,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:12:31,492 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1484351803, now seen corresponding path program 25 times [2020-10-26 19:12:31,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:31,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771680965] [2020-10-26 19:12:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:35,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:36,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:36,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 19:12:36,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:36,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:12:36,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:12:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:12:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:37,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:37,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:37,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:37,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:37,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:37,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:37,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-26 19:12:37,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771680965] [2020-10-26 19:12:37,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:37,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:12:37,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868616797] [2020-10-26 19:12:37,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:12:37,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:37,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:12:37,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:12:37,360 INFO L87 Difference]: Start difference. First operand 184 states and 240 transitions. Second operand 31 states. [2020-10-26 19:12:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:38,059 INFO L93 Difference]: Finished difference Result 317 states and 434 transitions. [2020-10-26 19:12:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:12:38,060 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2020-10-26 19:12:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:38,062 INFO L225 Difference]: With dead ends: 317 [2020-10-26 19:12:38,062 INFO L226 Difference]: Without dead ends: 194 [2020-10-26 19:12:38,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:12:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-26 19:12:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2020-10-26 19:12:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-26 19:12:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 248 transitions. [2020-10-26 19:12:38,071 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 248 transitions. Word has length 148 [2020-10-26 19:12:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:38,072 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 248 transitions. [2020-10-26 19:12:38,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:12:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 248 transitions. [2020-10-26 19:12:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:12:38,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:38,073 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:38,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:12:38,073 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1187759688, now seen corresponding path program 26 times [2020-10-26 19:12:38,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:38,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77531697] [2020-10-26 19:12:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:38,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:40,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:43,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:43,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:12:43,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:43,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5545 [2020-10-26 19:12:43,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:43,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:12:43,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:43,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:12:43,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:44,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:44,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:44,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:44,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-26 19:12:44,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77531697] [2020-10-26 19:12:44,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:44,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:12:44,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130427420] [2020-10-26 19:12:44,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:12:44,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:44,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:12:44,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:12:44,402 INFO L87 Difference]: Start difference. First operand 190 states and 248 transitions. Second operand 32 states. [2020-10-26 19:12:45,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:45,108 INFO L93 Difference]: Finished difference Result 327 states and 448 transitions. [2020-10-26 19:12:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:12:45,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 153 [2020-10-26 19:12:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:45,111 INFO L225 Difference]: With dead ends: 327 [2020-10-26 19:12:45,111 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:12:45,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:12:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:12:45,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2020-10-26 19:12:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-26 19:12:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 256 transitions. [2020-10-26 19:12:45,122 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 256 transitions. Word has length 153 [2020-10-26 19:12:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:45,122 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 256 transitions. [2020-10-26 19:12:45,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:12:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 256 transitions. [2020-10-26 19:12:45,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-26 19:12:45,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:45,124 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:45,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:12:45,124 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash -413870177, now seen corresponding path program 27 times [2020-10-26 19:12:45,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:45,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603568020] [2020-10-26 19:12:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:45,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:12:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:50,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:50,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:50,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:50,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:50,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:50,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:50,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:50,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:50,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-26 19:12:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603568020] [2020-10-26 19:12:50,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:50,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:12:50,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178468506] [2020-10-26 19:12:50,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:12:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:12:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:12:50,979 INFO L87 Difference]: Start difference. First operand 196 states and 256 transitions. Second operand 33 states. [2020-10-26 19:12:51,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:51,691 INFO L93 Difference]: Finished difference Result 337 states and 462 transitions. [2020-10-26 19:12:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:12:51,692 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 158 [2020-10-26 19:12:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:51,694 INFO L225 Difference]: With dead ends: 337 [2020-10-26 19:12:51,694 INFO L226 Difference]: Without dead ends: 206 [2020-10-26 19:12:51,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:12:51,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-26 19:12:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2020-10-26 19:12:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:12:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 264 transitions. [2020-10-26 19:12:51,704 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 264 transitions. Word has length 158 [2020-10-26 19:12:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:51,704 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 264 transitions. [2020-10-26 19:12:51,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:12:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 264 transitions. [2020-10-26 19:12:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 19:12:51,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:51,706 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:51,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:12:51,706 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:51,707 INFO L82 PathProgramCache]: Analyzing trace with hash -544205996, now seen corresponding path program 28 times [2020-10-26 19:12:51,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:51,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323618887] [2020-10-26 19:12:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:54,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:12:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:12:56,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:12:56,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:57,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:57,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:57,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-26 19:12:57,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323618887] [2020-10-26 19:12:57,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:57,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:12:57,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164944022] [2020-10-26 19:12:57,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:12:57,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:57,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:12:57,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:12:57,633 INFO L87 Difference]: Start difference. First operand 202 states and 264 transitions. Second operand 34 states. [2020-10-26 19:12:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:58,251 INFO L93 Difference]: Finished difference Result 347 states and 476 transitions. [2020-10-26 19:12:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:12:58,251 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 163 [2020-10-26 19:12:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:58,253 INFO L225 Difference]: With dead ends: 347 [2020-10-26 19:12:58,254 INFO L226 Difference]: Without dead ends: 212 [2020-10-26 19:12:58,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:12:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-26 19:12:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 208. [2020-10-26 19:12:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-26 19:12:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 272 transitions. [2020-10-26 19:12:58,264 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 272 transitions. Word has length 163 [2020-10-26 19:12:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:58,264 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 272 transitions. [2020-10-26 19:12:58,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:12:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 272 transitions. [2020-10-26 19:12:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 19:12:58,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:58,265 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:12:58,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:12:58,266 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash -602651133, now seen corresponding path program 29 times [2020-10-26 19:12:58,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:58,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904239716] [2020-10-26 19:12:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:01,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:03,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:13:03,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:04,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:04,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:04,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:04,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-26 19:13:04,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904239716] [2020-10-26 19:13:04,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:04,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:13:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179095887] [2020-10-26 19:13:04,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:13:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:13:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:13:04,157 INFO L87 Difference]: Start difference. First operand 208 states and 272 transitions. Second operand 35 states. [2020-10-26 19:13:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:04,825 INFO L93 Difference]: Finished difference Result 357 states and 490 transitions. [2020-10-26 19:13:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:13:04,825 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 168 [2020-10-26 19:13:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:04,827 INFO L225 Difference]: With dead ends: 357 [2020-10-26 19:13:04,827 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:13:04,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:13:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:13:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 214. [2020-10-26 19:13:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-26 19:13:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 280 transitions. [2020-10-26 19:13:04,837 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 280 transitions. Word has length 168 [2020-10-26 19:13:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:04,837 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 280 transitions. [2020-10-26 19:13:04,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:13:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 280 transitions. [2020-10-26 19:13:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:13:04,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:04,839 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:04,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:13:04,839 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash 64146672, now seen corresponding path program 30 times [2020-10-26 19:13:04,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:04,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342049623] [2020-10-26 19:13:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:04,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:09,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:13:09,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:10,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:10,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:10,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-26 19:13:10,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342049623] [2020-10-26 19:13:10,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:10,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:13:10,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676729478] [2020-10-26 19:13:10,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:13:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:10,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:13:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:13:10,845 INFO L87 Difference]: Start difference. First operand 214 states and 280 transitions. Second operand 36 states. [2020-10-26 19:13:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:11,667 INFO L93 Difference]: Finished difference Result 367 states and 504 transitions. [2020-10-26 19:13:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:13:11,668 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 173 [2020-10-26 19:13:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:11,670 INFO L225 Difference]: With dead ends: 367 [2020-10-26 19:13:11,670 INFO L226 Difference]: Without dead ends: 224 [2020-10-26 19:13:11,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:13:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-26 19:13:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2020-10-26 19:13:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-26 19:13:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 288 transitions. [2020-10-26 19:13:11,680 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 288 transitions. Word has length 173 [2020-10-26 19:13:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:11,680 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 288 transitions. [2020-10-26 19:13:11,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:13:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 288 transitions. [2020-10-26 19:13:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:13:11,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:11,682 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:11,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:13:11,682 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1686238311, now seen corresponding path program 31 times [2020-10-26 19:13:11,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:11,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222512274] [2020-10-26 19:13:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:11,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:16,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:13:16,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:17,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:17,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:17,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:17,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:17,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-26 19:13:17,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222512274] [2020-10-26 19:13:17,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:17,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:13:17,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643298071] [2020-10-26 19:13:17,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:13:17,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:17,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:13:17,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:13:17,774 INFO L87 Difference]: Start difference. First operand 220 states and 288 transitions. Second operand 37 states. [2020-10-26 19:13:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:18,595 INFO L93 Difference]: Finished difference Result 377 states and 518 transitions. [2020-10-26 19:13:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:13:18,595 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 178 [2020-10-26 19:13:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:18,597 INFO L225 Difference]: With dead ends: 377 [2020-10-26 19:13:18,597 INFO L226 Difference]: Without dead ends: 230 [2020-10-26 19:13:18,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:13:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-26 19:13:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2020-10-26 19:13:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-26 19:13:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 296 transitions. [2020-10-26 19:13:18,608 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 296 transitions. Word has length 178 [2020-10-26 19:13:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:18,608 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 296 transitions. [2020-10-26 19:13:18,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:13:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 296 transitions. [2020-10-26 19:13:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-26 19:13:18,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:18,610 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:18,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:13:18,611 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash 284305036, now seen corresponding path program 32 times [2020-10-26 19:13:18,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:18,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692856261] [2020-10-26 19:13:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:18,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:18,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:23,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:23,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-26 19:13:23,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:23,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-26 19:13:23,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:13:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:23,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:13:23,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:24,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:24,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-26 19:13:24,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692856261] [2020-10-26 19:13:24,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:24,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:13:24,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66466136] [2020-10-26 19:13:24,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:13:24,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:24,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:13:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:13:24,702 INFO L87 Difference]: Start difference. First operand 226 states and 296 transitions. Second operand 38 states. [2020-10-26 19:13:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:25,548 INFO L93 Difference]: Finished difference Result 387 states and 532 transitions. [2020-10-26 19:13:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:13:25,548 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 183 [2020-10-26 19:13:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:25,551 INFO L225 Difference]: With dead ends: 387 [2020-10-26 19:13:25,551 INFO L226 Difference]: Without dead ends: 236 [2020-10-26 19:13:25,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:13:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-26 19:13:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-10-26 19:13:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-26 19:13:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 304 transitions. [2020-10-26 19:13:25,562 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 304 transitions. Word has length 183 [2020-10-26 19:13:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:25,562 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 304 transitions. [2020-10-26 19:13:25,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:13:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 304 transitions. [2020-10-26 19:13:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 19:13:25,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:25,564 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:25,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:13:25,564 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1978147531, now seen corresponding path program 33 times [2020-10-26 19:13:25,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:25,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085671412] [2020-10-26 19:13:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:25,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:25,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:30,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:30,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-26 19:13:30,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-26 19:13:30,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:13:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:30,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:13:30,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:31,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:31,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-26 19:13:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085671412] [2020-10-26 19:13:31,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:31,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:13:31,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453636644] [2020-10-26 19:13:31,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:13:31,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:31,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:13:31,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:13:31,751 INFO L87 Difference]: Start difference. First operand 232 states and 304 transitions. Second operand 39 states. [2020-10-26 19:13:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:32,421 INFO L93 Difference]: Finished difference Result 397 states and 546 transitions. [2020-10-26 19:13:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:13:32,421 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 188 [2020-10-26 19:13:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:32,424 INFO L225 Difference]: With dead ends: 397 [2020-10-26 19:13:32,424 INFO L226 Difference]: Without dead ends: 242 [2020-10-26 19:13:32,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:13:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-26 19:13:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2020-10-26 19:13:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-26 19:13:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 312 transitions. [2020-10-26 19:13:32,434 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 312 transitions. Word has length 188 [2020-10-26 19:13:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:32,435 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 312 transitions. [2020-10-26 19:13:32,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:13:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 312 transitions. [2020-10-26 19:13:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 19:13:32,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:32,436 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:32,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:13:32,437 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash 946069544, now seen corresponding path program 34 times [2020-10-26 19:13:32,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:32,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392168496] [2020-10-26 19:13:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:32,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:37,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:38,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6141 [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:38,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:13:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:39,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:39,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:39,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3013 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-26 19:13:39,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392168496] [2020-10-26 19:13:39,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:39,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:13:39,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191063841] [2020-10-26 19:13:39,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:13:39,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:39,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:13:39,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:13:39,748 INFO L87 Difference]: Start difference. First operand 238 states and 312 transitions. Second operand 40 states. [2020-10-26 19:13:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:40,584 INFO L93 Difference]: Finished difference Result 407 states and 560 transitions. [2020-10-26 19:13:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:13:40,584 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 193 [2020-10-26 19:13:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:40,586 INFO L225 Difference]: With dead ends: 407 [2020-10-26 19:13:40,586 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:13:40,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:13:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:13:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2020-10-26 19:13:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-26 19:13:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 320 transitions. [2020-10-26 19:13:40,596 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 320 transitions. Word has length 193 [2020-10-26 19:13:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:40,596 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 320 transitions. [2020-10-26 19:13:40,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:13:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 320 transitions. [2020-10-26 19:13:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 19:13:40,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:40,598 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:40,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:13:40,599 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1324281553, now seen corresponding path program 35 times [2020-10-26 19:13:40,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:40,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599407306] [2020-10-26 19:13:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:40,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:13:45,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:46,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:46,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:46,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:46,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:46,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:46,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:46,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-26 19:13:46,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599407306] [2020-10-26 19:13:46,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:46,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:13:46,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914087628] [2020-10-26 19:13:46,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:13:46,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:13:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:13:46,861 INFO L87 Difference]: Start difference. First operand 244 states and 320 transitions. Second operand 41 states. [2020-10-26 19:13:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:47,650 INFO L93 Difference]: Finished difference Result 417 states and 574 transitions. [2020-10-26 19:13:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:13:47,651 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 198 [2020-10-26 19:13:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:47,653 INFO L225 Difference]: With dead ends: 417 [2020-10-26 19:13:47,654 INFO L226 Difference]: Without dead ends: 254 [2020-10-26 19:13:47,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:13:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-26 19:13:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2020-10-26 19:13:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-26 19:13:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 328 transitions. [2020-10-26 19:13:47,664 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 328 transitions. Word has length 198 [2020-10-26 19:13:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:47,664 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 328 transitions. [2020-10-26 19:13:47,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:13:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 328 transitions. [2020-10-26 19:13:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 19:13:47,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:47,666 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:47,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:13:47,666 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash 236829124, now seen corresponding path program 36 times [2020-10-26 19:13:47,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:47,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119860681] [2020-10-26 19:13:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:47,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:13:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:52,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:13:52,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:53,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:53,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:53,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:53,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:53,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-26 19:13:54,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119860681] [2020-10-26 19:13:54,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:54,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:13:54,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953538023] [2020-10-26 19:13:54,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:13:54,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:13:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:13:54,042 INFO L87 Difference]: Start difference. First operand 250 states and 328 transitions. Second operand 42 states. [2020-10-26 19:13:55,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:55,026 INFO L93 Difference]: Finished difference Result 427 states and 588 transitions. [2020-10-26 19:13:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:13:55,027 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 203 [2020-10-26 19:13:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:55,029 INFO L225 Difference]: With dead ends: 427 [2020-10-26 19:13:55,030 INFO L226 Difference]: Without dead ends: 260 [2020-10-26 19:13:55,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:13:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-26 19:13:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2020-10-26 19:13:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-26 19:13:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 336 transitions. [2020-10-26 19:13:55,040 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 336 transitions. Word has length 203 [2020-10-26 19:13:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:55,041 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 336 transitions. [2020-10-26 19:13:55,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:13:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 336 transitions. [2020-10-26 19:13:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 19:13:55,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:55,043 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:55,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:13:55,043 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:55,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1179058067, now seen corresponding path program 37 times [2020-10-26 19:13:55,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:55,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403125867] [2020-10-26 19:13:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking...