/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/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:33:24,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:33:24,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:33:24,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:33:24,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:33:24,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:33:24,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:33:24,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:33:24,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:33:24,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:33:24,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:33:24,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:33:24,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:33:24,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:33:24,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:33:24,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:33:24,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:33:24,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:33:24,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:33:24,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:33:24,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:33:24,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:33:24,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:33:24,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:33:24,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:33:24,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:33:24,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:33:24,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:33:24,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:33:24,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:33:24,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:33:24,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:33:24,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:33:24,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:33:24,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:33:24,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:33:24,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:33:24,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:33:24,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:33:24,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:33:24,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:33:24,348 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 19:33:24,387 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:33:24,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:33:24,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:33:24,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:33:24,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:33:24,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:33:24,390 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:33:24,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:33:24,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:33:24,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:33:24,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:33:24,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:33:24,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:33:24,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:33:24,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:33:24,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:33:24,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:33:24,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:33:24,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:33:24,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:33:24,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:33:24,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:33:24,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:33:24,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:33:24,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:33:24,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:33:24,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:33:24,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:33:24,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:33:24,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:33:24,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:33:24,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:33:24,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:33:24,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:33:24,866 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:33:24,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2020-10-26 19:33:24,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d14fa5b5/0839c5ffe69c497a8c317f64620e0361/FLAGd62dd8556 [2020-10-26 19:33:25,564 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:33:25,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2020-10-26 19:33:25,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d14fa5b5/0839c5ffe69c497a8c317f64620e0361/FLAGd62dd8556 [2020-10-26 19:33:25,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d14fa5b5/0839c5ffe69c497a8c317f64620e0361 [2020-10-26 19:33:25,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:33:25,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:33:25,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:25,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:33:25,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:33:25,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:25" (1/1) ... [2020-10-26 19:33:25,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4d0a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:25, skipping insertion in model container [2020-10-26 19:33:25,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:33:25" (1/1) ... [2020-10-26 19:33:25,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:33:25,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:33:26,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:26,192 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:33:26,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:33:26,231 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:33:26,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26 WrapperNode [2020-10-26 19:33:26,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:33:26,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:33:26,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:33:26,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:33:26,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (1/1) ... [2020-10-26 19:33:26,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:33:26,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:33:26,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:33:26,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:33:26,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (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 19:33:26,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:33:26,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:33:26,346 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:33:26,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:33:26,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:33:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:33:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:33:26,346 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:33:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:33:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:33:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:33:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:33:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:33:26,347 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:33:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:33:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:33:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:33:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:33:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:33:26,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:33:26,646 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:33:26,647 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:33:26,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:26 BoogieIcfgContainer [2020-10-26 19:33:26,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:33:26,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:33:26,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:33:26,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:33:26,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:33:25" (1/3) ... [2020-10-26 19:33:26,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd4b412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:26, skipping insertion in model container [2020-10-26 19:33:26,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:33:26" (2/3) ... [2020-10-26 19:33:26,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd4b412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:33:26, skipping insertion in model container [2020-10-26 19:33:26,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:33:26" (3/3) ... [2020-10-26 19:33:26,660 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2020-10-26 19:33:26,674 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:33:26,679 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:33:26,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:33:26,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:33:26,740 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:33:26,740 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:33:26,741 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:33:26,741 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:33:26,741 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:33:26,741 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:33:26,741 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:33:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-26 19:33:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:33:26,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:26,801 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:26,801 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:26,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-26 19:33:26,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:26,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588929315] [2020-10-26 19:33:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:27,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:27,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:33:27,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-26 19:33:27,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:27,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:27,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:27,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:33:27,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:33:27,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:27,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:27,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:27,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:27,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:33:27,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:27,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:27,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:27,530 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 19:33:27,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588929315] [2020-10-26 19:33:27,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:33:27,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:33:27,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29527989] [2020-10-26 19:33:27,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:33:27,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:33:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:33:27,574 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-26 19:33:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:27,701 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2020-10-26 19:33:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:33:27,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:33:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:27,711 INFO L225 Difference]: With dead ends: 49 [2020-10-26 19:33:27,712 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:33:27,715 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 19:33:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:33:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 19:33:27,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 19:33:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-26 19:33:27,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-26 19:33:27,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:27,762 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-26 19:33:27,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:33:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-26 19:33:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:33:27,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:27,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:27,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:33:27,764 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:27,766 INFO L82 PathProgramCache]: Analyzing trace with hash -577359468, now seen corresponding path program 1 times [2020-10-26 19:33:27,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:27,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767278936] [2020-10-26 19:33:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:27,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:27,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:28,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:33:28,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:28,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-26 19:33:28,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:28,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:33:28,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:28,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:33:28,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:28,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:28,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:28,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:28,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:33:28,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:28,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:28,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:33:28,220 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 19:33:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767278936] [2020-10-26 19:33:28,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:28,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:33:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425713827] [2020-10-26 19:33:28,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:33:28,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:33:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:33:28,225 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-26 19:33:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:28,348 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-26 19:33:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:33:28,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:33:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:28,351 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:28,352 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 19:33:28,353 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 19:33:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 19:33:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-26 19:33:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:33:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 19:33:28,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-26 19:33:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:28,366 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 19:33:28,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:33:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 19:33:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:33:28,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:28,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:28,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:33:28,368 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -446889165, now seen corresponding path program 1 times [2020-10-26 19:33:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:28,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845938339] [2020-10-26 19:33:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:28,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:28,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:33:29,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:29,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-26 19:33:29,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:33:29,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:29,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:33:29,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:33:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:29,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:29,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:29,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:33:29,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:29,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:29,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:29,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:29,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:33:29,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845938339] [2020-10-26 19:33:29,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:29,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:33:29,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247025305] [2020-10-26 19:33:29,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:33:29,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:29,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:33:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:33:29,125 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-26 19:33:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:29,259 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-26 19:33:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:33:29,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 19:33:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:29,261 INFO L225 Difference]: With dead ends: 43 [2020-10-26 19:33:29,261 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:33:29,262 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 19:33:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:33:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-26 19:33:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:33:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-26 19:33:29,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2020-10-26 19:33:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:29,270 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-26 19:33:29,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:33:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-26 19:33:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:33:29,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:29,272 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:29,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:33:29,272 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 505618241, now seen corresponding path program 2 times [2020-10-26 19:33:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:29,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268246932] [2020-10-26 19:33:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:29,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:29,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:30,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:33:30,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:30,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-26 19:33:30,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:33:30,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:30,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:30,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:30,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:30,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:30,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:33:30,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:30,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:30,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:30,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:30,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268246932] [2020-10-26 19:33:30,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:30,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:30,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055607704] [2020-10-26 19:33:30,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:30,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:30,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:30,274 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-10-26 19:33:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:30,531 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-26 19:33:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:30,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-26 19:33:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:30,533 INFO L225 Difference]: With dead ends: 41 [2020-10-26 19:33:30,533 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:33:30,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:33:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-26 19:33:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:33:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:33:30,543 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2020-10-26 19:33:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:30,544 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:33:30,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:33:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:33:30,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:30,545 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:30,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:33:30,545 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1957781260, now seen corresponding path program 3 times [2020-10-26 19:33:30,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:30,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815329670] [2020-10-26 19:33:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:30,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:33:31,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:31,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-26 19:33:31,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:31,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:33:31,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:31,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:31,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:33:31,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:31,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:31,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:31,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815329670] [2020-10-26 19:33:31,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:31,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:31,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037262166] [2020-10-26 19:33:31,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:31,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:31,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:31,958 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-26 19:33:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:32,325 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-26 19:33:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:32,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:33:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:32,330 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:33:32,330 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:33:32,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:33:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-10-26 19:33:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:33:32,352 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-26 19:33:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:32,352 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:33:32,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:33:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:33:32,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:32,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:32,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:33:32,354 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:32,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 4 times [2020-10-26 19:33:32,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:32,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331525617] [2020-10-26 19:33:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:32,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:32,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:33,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:33:33,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:33,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1208 [2020-10-26 19:33:33,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:33:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:33:33,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:33,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:33,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:33,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:33,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331525617] [2020-10-26 19:33:33,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:33,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:33:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193845981] [2020-10-26 19:33:33,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:33:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:33:33,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:33:33,692 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-26 19:33:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:33,817 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-26 19:33:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:33:33,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-26 19:33:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:33,822 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:33:33,822 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:33:33,823 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 19:33:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:33:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-26 19:33:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:33:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:33:33,839 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2020-10-26 19:33:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:33,840 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:33:33,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:33:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:33:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:33:33,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:33,842 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:33,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:33:33,843 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1714546989, now seen corresponding path program 5 times [2020-10-26 19:33:33,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:33,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758419546] [2020-10-26 19:33:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:33:35,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:35,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1414 [2020-10-26 19:33:35,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:33:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:35,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:35,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:35,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:35,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:35,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:35,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:35,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:35,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758419546] [2020-10-26 19:33:35,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:35,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:33:35,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790549645] [2020-10-26 19:33:35,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:33:35,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:33:35,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:33:35,358 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-10-26 19:33:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:35,441 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-26 19:33:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:33:35,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 19:33:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:35,443 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:33:35,443 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:33:35,445 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 19:33:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:33:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-26 19:33:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-26 19:33:35,461 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-26 19:33:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:35,461 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-26 19:33:35,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:33:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-26 19:33:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:33:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:35,463 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:35,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:33:35,464 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1964278815, now seen corresponding path program 6 times [2020-10-26 19:33:35,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:35,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629582140] [2020-10-26 19:33:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:37,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:33:37,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:37,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1674 [2020-10-26 19:33:37,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:33:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:33:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:37,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:37,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:37,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:37,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:37,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:37,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:37,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:37,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:37,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:37,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:37,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:33:37,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629582140] [2020-10-26 19:33:37,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:37,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:33:37,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171460776] [2020-10-26 19:33:37,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:33:37,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:37,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:33:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:33:37,241 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-26 19:33:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:37,341 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-26 19:33:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:33:37,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-26 19:33:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:37,343 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:33:37,343 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:33:37,344 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 19:33:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:33:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-26 19:33:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:33:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:33:37,352 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-26 19:33:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:37,352 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:33:37,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:33:37,352 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:33:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:33:37,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:37,370 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:37,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:33:37,370 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:37,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1116030829, now seen corresponding path program 7 times [2020-10-26 19:33:37,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:37,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898016404] [2020-10-26 19:33:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:37,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:39,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:33:39,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:39,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1852 [2020-10-26 19:33:39,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:39,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:33:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:39,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:39,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:39,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:39,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:39,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:39,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:39,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:33:39,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898016404] [2020-10-26 19:33:39,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:39,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:39,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713193246] [2020-10-26 19:33:39,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:39,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:39,425 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-10-26 19:33:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:39,717 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-26 19:33:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:39,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-26 19:33:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:39,719 INFO L225 Difference]: With dead ends: 48 [2020-10-26 19:33:39,719 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:33:39,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:33:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-10-26 19:33:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:33:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-26 19:33:39,727 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 26 [2020-10-26 19:33:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:39,728 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-26 19:33:39,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-26 19:33:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:33:39,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:39,729 INFO L422 BasicCegarLoop]: trace histogram [6, 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 19:33:39,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:33:39,729 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -248242047, now seen corresponding path program 1 times [2020-10-26 19:33:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:39,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699424624] [2020-10-26 19:33:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:39,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:33:40,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:40,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-26 19:33:40,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:33:40,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:40,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:33:40,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:40,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:40,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:40,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:33:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:40,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:40,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:40,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699424624] [2020-10-26 19:33:40,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:40,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:33:40,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648146267] [2020-10-26 19:33:40,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:33:40,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:33:40,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:33:40,384 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2020-10-26 19:33:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:40,481 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-26 19:33:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:33:40,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-26 19:33:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:40,482 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:33:40,482 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:33:40,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 19:33:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:33:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:33:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:33:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-26 19:33:40,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-26 19:33:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:40,490 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-26 19:33:40,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:33:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-26 19:33:40,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:33:40,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:40,492 INFO L422 BasicCegarLoop]: trace histogram [7, 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 19:33:40,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:33:40,492 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2054918067, now seen corresponding path program 2 times [2020-10-26 19:33:40,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:40,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075295179] [2020-10-26 19:33:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:41,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:41,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:33:41,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-26 19:33:41,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:41,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:33:41,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:41,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:33:41,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:41,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:41,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:41,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:41,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:41,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:41,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:41,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:41,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:41,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:41,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:41,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:33:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:41,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:41,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:41,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:41,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:41,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:41,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:41,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:41,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075295179] [2020-10-26 19:33:41,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:41,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:33:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518968222] [2020-10-26 19:33:41,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:33:41,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:41,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:33:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:33:41,214 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-26 19:33:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:41,327 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-26 19:33:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:33:41,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:33:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:41,328 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:33:41,328 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:33:41,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 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 19:33:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:33:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-26 19:33:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:33:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-26 19:33:41,336 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-10-26 19:33:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:41,336 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-26 19:33:41,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:33:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-26 19:33:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:33:41,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:41,337 INFO L422 BasicCegarLoop]: trace histogram [8, 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 19:33:41,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:33:41,338 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash 438437569, now seen corresponding path program 3 times [2020-10-26 19:33:41,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:41,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350599553] [2020-10-26 19:33:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:41,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:33:42,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:42,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-26 19:33:42,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:42,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:33:42,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:42,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:42,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-26 19:33:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:42,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:42,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:42,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:42,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:42,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:42,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:42,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350599553] [2020-10-26 19:33:42,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:42,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085490112] [2020-10-26 19:33:42,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:42,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:42,215 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2020-10-26 19:33:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:42,299 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-26 19:33:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:33:42,300 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-26 19:33:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:42,301 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:33:42,301 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:33:42,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:33:42,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:33:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:33:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-26 19:33:42,309 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-10-26 19:33:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:42,310 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-26 19:33:42,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-26 19:33:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:33:42,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:42,311 INFO L422 BasicCegarLoop]: trace histogram [9, 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 19:33:42,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:33:42,312 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1867149683, now seen corresponding path program 4 times [2020-10-26 19:33:42,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:42,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755134747] [2020-10-26 19:33:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:42,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:43,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:43,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:33:43,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:43,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-26 19:33:43,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:43,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:43,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:43,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:33:43,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:43,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:43,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:43,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:43,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:43,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:43,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:43,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:43,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:43,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:43,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:43,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:33:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:43,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:43,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:43,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:43,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:43,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:43,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:43,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:33:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755134747] [2020-10-26 19:33:43,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:43,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:43,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850813841] [2020-10-26 19:33:43,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:43,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:43,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:43,377 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-26 19:33:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:43,526 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-26 19:33:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:33:43,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-26 19:33:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:43,527 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:33:43,527 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:33:43,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 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 19:33:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:33:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-26 19:33:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:33:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-26 19:33:43,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-26 19:33:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:43,537 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-26 19:33:43,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:33:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-26 19:33:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:33:43,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:43,538 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:43,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:33:43,539 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1472427026, now seen corresponding path program 5 times [2020-10-26 19:33:43,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:43,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771633859] [2020-10-26 19:33:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:43,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:43,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:46,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:46,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:33:46,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:46,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3303 [2020-10-26 19:33:46,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:33:46,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:46,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:33:46,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:47,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:47,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:47,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:47,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:47,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:47,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:47,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:47,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:33:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:47,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:47,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:47,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:47,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:47,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:47,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:47,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:47,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:33:47,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771633859] [2020-10-26 19:33:47,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:47,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:33:47,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063453963] [2020-10-26 19:33:47,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:33:47,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:47,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:33:47,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:33:47,039 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-26 19:33:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:47,222 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-26 19:33:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:33:47,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-26 19:33:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:47,224 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:33:47,224 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:33:47,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 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 19:33:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:33:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-26 19:33:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:33:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-26 19:33:47,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-10-26 19:33:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:47,236 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-26 19:33:47,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:33:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-26 19:33:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:33:47,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:47,238 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:47,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:33:47,239 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:47,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1109111840, now seen corresponding path program 6 times [2020-10-26 19:33:47,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:47,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210707540] [2020-10-26 19:33:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:50,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:33:50,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:50,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3507 [2020-10-26 19:33:50,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:50,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:33:50,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:50,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:33:50,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:50,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:50,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:50,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:50,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:50,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:50,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:50,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:50,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-26 19:33:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:50,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:50,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:50,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:50,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:50,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:50,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-26 19:33:50,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210707540] [2020-10-26 19:33:50,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:50,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:33:50,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639101845] [2020-10-26 19:33:50,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:33:50,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:33:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:33:50,997 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2020-10-26 19:33:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:51,360 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-26 19:33:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:33:51,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-26 19:33:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:51,363 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:33:51,363 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:33:51,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:33:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:33:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-26 19:33:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:33:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:33:51,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 37 [2020-10-26 19:33:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:51,385 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:33:51,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:33:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:33:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:33:51,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:51,387 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:51,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:33:51,387 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash 845283539, now seen corresponding path program 7 times [2020-10-26 19:33:51,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:51,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746828038] [2020-10-26 19:33:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:51,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:51,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:54,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:33:54,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3498 [2020-10-26 19:33:54,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:33:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:33:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:55,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:55,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:55,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:55,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:55,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:55,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:55,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:55,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:55,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:33:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:55,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:55,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:55,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:55,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:33:55,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746828038] [2020-10-26 19:33:55,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:55,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:33:55,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492083494] [2020-10-26 19:33:55,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:33:55,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:55,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:33:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:33:55,152 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 15 states. [2020-10-26 19:33:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:55,393 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-26 19:33:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:33:55,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-26 19:33:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:55,397 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:33:55,397 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:33:55,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 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 19:33:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:33:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-26 19:33:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:33:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-26 19:33:55,407 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 38 [2020-10-26 19:33:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:55,407 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-26 19:33:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:33:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-26 19:33:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:33:55,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:55,408 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:55,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:33:55,408 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash -408259231, now seen corresponding path program 8 times [2020-10-26 19:33:55,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:55,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040405544] [2020-10-26 19:33:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:55,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:59,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:59,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:33:59,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:59,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3776 [2020-10-26 19:33:59,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:59,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:33:59,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:59,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:33:59,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:59,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:59,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:59,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:33:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:59,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:59,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:59,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:59,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:59,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:59,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:33:59,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:59,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:33:59,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-26 19:33:59,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040405544] [2020-10-26 19:33:59,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:59,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:33:59,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5641968] [2020-10-26 19:33:59,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:33:59,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:33:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:33:59,451 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 13 states. [2020-10-26 19:34:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:00,005 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-26 19:34:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:34:00,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-26 19:34:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:00,007 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:34:00,007 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:34:00,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:34:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-10-26 19:34:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:34:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-26 19:34:00,018 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 39 [2020-10-26 19:34:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:00,018 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-26 19:34:00,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:34:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-26 19:34:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:34:00,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:00,019 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:00,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:34:00,020 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1051420594, now seen corresponding path program 9 times [2020-10-26 19:34:00,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:00,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681119151] [2020-10-26 19:34:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:00,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:00,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3660 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:34:03,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:03,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:03,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:03,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:03,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:03,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:03,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:03,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:34:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:03,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:03,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:03,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:03,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:03,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681119151] [2020-10-26 19:34:03,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:03,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:34:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433778639] [2020-10-26 19:34:03,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:34:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:34:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:34:03,914 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 16 states. [2020-10-26 19:34:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:04,158 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-10-26 19:34:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:34:04,159 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-26 19:34:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:04,160 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:34:04,160 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:34:04,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:34:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:34:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-26 19:34:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:34:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-26 19:34:04,170 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 40 [2020-10-26 19:34:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:04,170 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-26 19:34:04,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:34:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-26 19:34:04,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:34:04,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:04,171 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:04,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:34:04,172 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1012338496, now seen corresponding path program 10 times [2020-10-26 19:34:04,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000626269] [2020-10-26 19:34:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:04,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:04,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:04,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:07,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:07,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:34:07,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:07,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3723 [2020-10-26 19:34:07,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:07,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:34:07,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:07,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:34:07,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:08,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:08,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:08,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:34:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:08,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:08,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:08,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:08,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:08,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:08,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:08,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000626269] [2020-10-26 19:34:08,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:08,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:34:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504699186] [2020-10-26 19:34:08,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:34:08,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:34:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:34:08,158 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2020-10-26 19:34:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:08,419 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-26 19:34:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:34:08,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-26 19:34:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:08,421 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:34:08,421 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:34:08,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 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 19:34:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:34:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-26 19:34:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:34:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-26 19:34:08,430 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2020-10-26 19:34:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:08,430 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-26 19:34:08,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:34:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-26 19:34:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:34:08,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:08,431 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:08,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:34:08,431 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -564360846, now seen corresponding path program 11 times [2020-10-26 19:34:08,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:08,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931388480] [2020-10-26 19:34:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:34:12,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:12,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3947 [2020-10-26 19:34:12,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:34:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:34:12,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:12,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:12,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:12,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:12,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:12,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:34:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:12,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:12,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:12,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:12,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:12,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:34:12,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931388480] [2020-10-26 19:34:12,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:12,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:34:12,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284154425] [2020-10-26 19:34:12,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:34:12,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:34:12,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:34:12,655 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 18 states. [2020-10-26 19:34:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:12,808 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-26 19:34:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:34:12,809 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-26 19:34:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:12,810 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:34:12,810 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:34:12,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 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 19:34:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:34:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-26 19:34:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:34:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-10-26 19:34:12,820 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 42 [2020-10-26 19:34:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:12,820 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-10-26 19:34:12,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:34:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-10-26 19:34:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:34:12,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:12,821 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:12,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:34:12,821 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 438044416, now seen corresponding path program 12 times [2020-10-26 19:34:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:12,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740627519] [2020-10-26 19:34:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:12,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:12,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4346 [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:34:17,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:17,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:34:17,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:17,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:17,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:17,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:17,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:17,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:17,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:17,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:34:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:17,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:17,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:17,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:17,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:17,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:34:17,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:17,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:17,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-26 19:34:17,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740627519] [2020-10-26 19:34:17,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:17,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:34:17,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480417947] [2020-10-26 19:34:17,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:34:17,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:17,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:34:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:34:17,449 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 14 states. [2020-10-26 19:34:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:17,940 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-10-26 19:34:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:34:17,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-26 19:34:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:17,944 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:34:17,944 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:34:17,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:17,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:34:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-10-26 19:34:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:34:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-26 19:34:17,954 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-26 19:34:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:17,954 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-26 19:34:17,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:34:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-26 19:34:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:34:17,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:17,955 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:17,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:34:17,955 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:17,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2029809164, now seen corresponding path program 13 times [2020-10-26 19:34:17,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:17,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750646919] [2020-10-26 19:34:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:17,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:17,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:19,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1427 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:34:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:19,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:19,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:19,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:19,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:19,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:19,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:34:19,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:19,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:19,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-26 19:34:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:19,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:19,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:19,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:19,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:19,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:19,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:19,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:19,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:19,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:19,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:19,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:34:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:19,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:19,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:19,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:19,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:19,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:19,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:19,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:19,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:34:19,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750646919] [2020-10-26 19:34:19,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:19,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:34:19,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204069470] [2020-10-26 19:34:19,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:34:19,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:34:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:34:19,723 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-26 19:34:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:20,015 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-26 19:34:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:20,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:34:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:20,016 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:34:20,016 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:34:20,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 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 19:34:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:34:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:34:20,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:34:20,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-26 19:34:20,028 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-26 19:34:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:20,028 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-26 19:34:20,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:34:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-26 19:34:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:34:20,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:20,030 INFO L422 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:20,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:34:20,030 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2049322242, now seen corresponding path program 14 times [2020-10-26 19:34:20,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:20,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244014622] [2020-10-26 19:34:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:20,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:34:22,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:34:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2008 [2020-10-26 19:34:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:34:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:34:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:22,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:22,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:22,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:22,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:34:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:22,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:22,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:22,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:22,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:22,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:22,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:34:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:22,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:22,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:22,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:22,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:34:22,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244014622] [2020-10-26 19:34:22,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:22,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:34:22,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157589661] [2020-10-26 19:34:22,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:34:22,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:22,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:34:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:22,396 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 20 states. [2020-10-26 19:34:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:22,597 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-26 19:34:22,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:34:22,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-26 19:34:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:22,599 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:34:22,599 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:34:22,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 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 19:34:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:34:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:34:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:34:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-26 19:34:22,611 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-26 19:34:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:22,611 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-26 19:34:22,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:34:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-26 19:34:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:34:22,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:22,612 INFO L422 BasicCegarLoop]: trace histogram [17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:22,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:34:22,612 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash -346623052, now seen corresponding path program 15 times [2020-10-26 19:34:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:22,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52964354] [2020-10-26 19:34:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:22,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:24,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:24,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:34:24,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:34:24,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1996 [2020-10-26 19:34:24,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:24,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:34:24,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:24,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:34:24,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:24,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:24,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:24,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:24,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:24,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:34:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:24,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:24,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:24,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:24,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:24,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:24,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:24,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:24,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:24,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:24,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:24,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:34:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:24,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:24,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:24,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:24,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:24,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:24,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:24,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:24,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 153 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:34:24,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52964354] [2020-10-26 19:34:24,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:24,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:34:24,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251935942] [2020-10-26 19:34:24,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:34:24,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:34:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:24,986 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-10-26 19:34:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:25,198 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-26 19:34:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:34:25,199 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-26 19:34:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:25,199 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:34:25,200 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:34:25,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:34:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:34:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-26 19:34:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:34:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-26 19:34:25,212 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2020-10-26 19:34:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:25,212 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-26 19:34:25,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:34:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-26 19:34:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:34:25,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:25,213 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:25,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:34:25,215 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash 255928147, now seen corresponding path program 16 times [2020-10-26 19:34:25,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:25,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343304218] [2020-10-26 19:34:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:26,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:29,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:29,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4284 [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:34:29,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:29,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:29,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:29,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:29,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:29,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 19:34:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:29,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:29,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:29,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:29,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:29,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:34:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:29,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 4 proven. 171 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:34:29,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343304218] [2020-10-26 19:34:29,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:29,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:34:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877854644] [2020-10-26 19:34:29,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:34:29,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:29,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:34:29,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:34:29,890 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-26 19:34:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:30,134 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2020-10-26 19:34:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:34:30,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-26 19:34:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:30,137 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:34:30,137 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:34:30,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 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 19:34:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:34:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-26 19:34:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:34:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-26 19:34:30,149 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-26 19:34:30,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:30,150 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-26 19:34:30,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:34:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-26 19:34:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:34:30,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:30,155 INFO L422 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:30,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:34:30,155 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:30,156 INFO L82 PathProgramCache]: Analyzing trace with hash 711166817, now seen corresponding path program 17 times [2020-10-26 19:34:30,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:30,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758650063] [2020-10-26 19:34:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:30,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:30,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:35,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:35,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:34:35,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:35,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:34:35,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:34:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:35,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 19:34:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:35,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:35,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:35,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:35,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:35,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:34:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:35,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:35,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:35,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:35,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:35,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:35,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:35,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:35,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 19:34:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:35,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:35,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-26 19:34:35,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758650063] [2020-10-26 19:34:35,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:35,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:34:35,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029899849] [2020-10-26 19:34:35,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:34:35,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:34:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:34:35,497 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 14 states. [2020-10-26 19:34:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:36,060 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-26 19:34:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:34:36,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-26 19:34:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:36,062 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:34:36,062 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:34:36,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:34:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:34:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-26 19:34:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:34:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-10-26 19:34:36,078 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 53 [2020-10-26 19:34:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:36,078 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-10-26 19:34:36,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:34:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-10-26 19:34:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:34:36,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:36,079 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:36,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:34:36,079 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash -911367404, now seen corresponding path program 18 times [2020-10-26 19:34:36,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:36,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471401844] [2020-10-26 19:34:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:36,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:38,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:41,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:41,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:34:41,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:41,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:41,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:41,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:41,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:34:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:41,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:41,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:41,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:34:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:41,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:41,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:41,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:41,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 4 proven. 190 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:34:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471401844] [2020-10-26 19:34:41,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:41,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:34:41,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193903019] [2020-10-26 19:34:41,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:34:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:34:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:34:41,508 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 23 states. [2020-10-26 19:34:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:41,719 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-26 19:34:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:34:41,719 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-26 19:34:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:41,720 INFO L225 Difference]: With dead ends: 119 [2020-10-26 19:34:41,721 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:34:41,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 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 19:34:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:34:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-26 19:34:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:34:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-10-26 19:34:41,735 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 54 [2020-10-26 19:34:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:41,735 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-10-26 19:34:41,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:34:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-10-26 19:34:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:34:41,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:41,739 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:41,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:34:41,739 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1513669726, now seen corresponding path program 19 times [2020-10-26 19:34:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:41,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160602783] [2020-10-26 19:34:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:41,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:46,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:46,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:34:46,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:46,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:34:46,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:34:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:46,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:34:46,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:47,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:47,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:47,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:47,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:47,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:34:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:47,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:47,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:47,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:47,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:47,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:47,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:34:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:47,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:47,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:47,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:47,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:47,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:34:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:47,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:34:47,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-10-26 19:34:47,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160602783] [2020-10-26 19:34:47,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:47,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:34:47,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080029566] [2020-10-26 19:34:47,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:34:47,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:34:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:34:47,069 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 15 states. [2020-10-26 19:34:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:47,852 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-26 19:34:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:34:47,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-26 19:34:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:47,855 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:34:47,855 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:34:47,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:34:47,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:34:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2020-10-26 19:34:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:34:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-26 19:34:47,867 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 55 [2020-10-26 19:34:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:47,867 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-26 19:34:47,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:34:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-26 19:34:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:34:47,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:47,868 INFO L422 BasicCegarLoop]: trace histogram [20, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:47,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:34:47,868 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1161823501, now seen corresponding path program 20 times [2020-10-26 19:34:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:47,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875746134] [2020-10-26 19:34:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:47,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:47,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:50,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:52,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:52,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:34:52,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:34:52,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:34:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:34:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:53,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:53,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:53,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:53,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:53,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-26 19:34:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:53,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:34:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:53,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:53,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:34:53,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875746134] [2020-10-26 19:34:53,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:53,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:34:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215448069] [2020-10-26 19:34:53,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:34:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:34:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:34:53,328 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 24 states. [2020-10-26 19:34:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:53,527 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2020-10-26 19:34:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:34:53,527 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-26 19:34:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:53,528 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:34:53,528 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:34:53,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:34:53,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:34:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-26 19:34:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:34:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-26 19:34:53,541 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 56 [2020-10-26 19:34:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:53,541 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-26 19:34:53,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:34:53,541 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-26 19:34:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:34:53,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:53,542 INFO L422 BasicCegarLoop]: trace histogram [21, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:53,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:34:53,543 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash -153769983, now seen corresponding path program 21 times [2020-10-26 19:34:53,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:53,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598124638] [2020-10-26 19:34:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:53,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:53,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:56,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:58,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:58,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:34:58,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:34:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:34:58,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:34:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:34:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:59,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:59,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:59,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:59,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:34:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:59,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:59,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:34:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:59,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:59,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:59,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:34:59,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:59,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:34:59,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:34:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:59,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:34:59,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598124638] [2020-10-26 19:34:59,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:59,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:34:59,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424548582] [2020-10-26 19:34:59,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:34:59,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:59,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:34:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:34:59,029 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 25 states. [2020-10-26 19:34:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:59,297 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2020-10-26 19:34:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:34:59,298 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-26 19:34:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:59,299 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:34:59,299 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:34:59,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 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 19:34:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:34:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-26 19:34:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:34:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-26 19:34:59,310 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 57 [2020-10-26 19:34:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:59,310 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-26 19:34:59,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:34:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-26 19:34:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:34:59,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:59,311 INFO L422 BasicCegarLoop]: trace histogram [22, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:59,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:34:59,311 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:59,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1031118003, now seen corresponding path program 22 times [2020-10-26 19:34:59,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:59,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293892148] [2020-10-26 19:34:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:02,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:04,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:04,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:35:04,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:35:04,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:35:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:35:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:04,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:04,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:04,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:04,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:04,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:04,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:04,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:04,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:35:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:04,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:04,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:04,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:04,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:35:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:04,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:04,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 4 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:35:04,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293892148] [2020-10-26 19:35:04,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:04,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:35:04,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714248816] [2020-10-26 19:35:04,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:35:04,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:35:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:35:04,829 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 26 states. [2020-10-26 19:35:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:05,157 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2020-10-26 19:35:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:35:05,164 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-26 19:35:05,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:05,165 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:35:05,165 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:35:05,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 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 19:35:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:35:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-10-26 19:35:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:35:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-10-26 19:35:05,179 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2020-10-26 19:35:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:05,179 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-10-26 19:35:05,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:35:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-10-26 19:35:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:35:05,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:05,180 INFO L422 BasicCegarLoop]: trace histogram [23, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:05,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:35:05,180 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash -892060095, now seen corresponding path program 23 times [2020-10-26 19:35:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:05,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16435473] [2020-10-26 19:35:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:05,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:08,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:10,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-26 19:35:10,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:10,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:10,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:10,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:10,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:10,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:10,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:35:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:10,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:10,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:10,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:10,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:10,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:10,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:10,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:10,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:10,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:35:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:10,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:10,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:10,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:10,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:10,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:10,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:10,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:10,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:10,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:10,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-10-26 19:35:10,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16435473] [2020-10-26 19:35:10,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:10,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:35:10,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560913240] [2020-10-26 19:35:10,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:35:10,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:35:10,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:35:10,560 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 16 states. [2020-10-26 19:35:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:11,258 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-26 19:35:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:35:11,258 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-10-26 19:35:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:11,259 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:35:11,259 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:35:11,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:35:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:35:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-26 19:35:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:35:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-26 19:35:11,269 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 59 [2020-10-26 19:35:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:11,269 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-26 19:35:11,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:35:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-26 19:35:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:35:11,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:11,270 INFO L422 BasicCegarLoop]: trace histogram [23, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:11,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:35:11,270 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:11,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:11,271 INFO L82 PathProgramCache]: Analyzing trace with hash 136396691, now seen corresponding path program 24 times [2020-10-26 19:35:11,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:11,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491789749] [2020-10-26 19:35:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:15,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:15,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4262 [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:35:15,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:16,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:16,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:16,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:16,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:35:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:16,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:16,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:16,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:16,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:35:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:16,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:16,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:16,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:16,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:35:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:16,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:16,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:16,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 6 proven. 276 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:35:16,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491789749] [2020-10-26 19:35:16,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:16,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:35:16,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903439842] [2020-10-26 19:35:16,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:35:16,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:35:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:35:16,079 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 27 states. [2020-10-26 19:35:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:16,405 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-26 19:35:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:35:16,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:35:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:16,407 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:35:16,407 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:35:16,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 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 19:35:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:35:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:35:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:35:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-26 19:35:16,417 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-26 19:35:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:16,417 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-26 19:35:16,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:35:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-26 19:35:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:35:16,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:16,418 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:16,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:35:16,418 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:16,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1174929759, now seen corresponding path program 25 times [2020-10-26 19:35:16,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:16,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252199798] [2020-10-26 19:35:16,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:16,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4561 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:35:20,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:21,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:21,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:21,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:21,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:21,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:21,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:21,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:21,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:35:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:21,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:21,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:21,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:21,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:21,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:35:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:21,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:21,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:21,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:21,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:35:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:21,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:21,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 6 proven. 300 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:35:21,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252199798] [2020-10-26 19:35:21,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:21,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:35:21,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395098146] [2020-10-26 19:35:21,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:35:21,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:21,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:35:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:21,574 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 28 states. [2020-10-26 19:35:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:21,923 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-10-26 19:35:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:35:21,923 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-26 19:35:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:21,924 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:35:21,924 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:35:21,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:35:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:35:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:35:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:35:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-26 19:35:21,935 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-26 19:35:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:21,935 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-26 19:35:21,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:35:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-26 19:35:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:35:21,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:21,936 INFO L422 BasicCegarLoop]: trace histogram [25, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:21,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:35:21,936 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1123623251, now seen corresponding path program 26 times [2020-10-26 19:35:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:21,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354998638] [2020-10-26 19:35:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:21,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:21,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:26,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:35:26,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:27,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:35:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:27,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:27,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:27,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:27,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:27,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:35:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:27,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:27,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:27,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:27,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:27,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:27,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:27,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:27,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:27,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:27,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:35:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:27,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:27,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 6 proven. 325 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:35:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354998638] [2020-10-26 19:35:27,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:27,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:35:27,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545891786] [2020-10-26 19:35:27,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:35:27,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:27,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:35:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:35:27,573 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2020-10-26 19:35:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:27,829 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-26 19:35:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:35:27,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-26 19:35:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:27,831 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:35:27,831 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:35:27,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 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 19:35:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:35:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-26 19:35:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:35:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-26 19:35:27,841 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-26 19:35:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:27,841 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-26 19:35:27,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:35:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-26 19:35:27,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:35:27,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:27,842 INFO L422 BasicCegarLoop]: trace histogram [26, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:27,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:35:27,842 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:27,843 INFO L82 PathProgramCache]: Analyzing trace with hash -837581326, now seen corresponding path program 27 times [2020-10-26 19:35:27,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:27,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140611760] [2020-10-26 19:35:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:27,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:27,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:31,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:32,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:32,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:35:32,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:33,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:33,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:33,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:33,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:35:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:33,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:33,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:33,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:33,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:35:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:33,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:33,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:35:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:33,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:33,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 6 proven. 351 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-26 19:35:33,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140611760] [2020-10-26 19:35:33,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:33,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:35:33,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778840185] [2020-10-26 19:35:33,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:35:33,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:35:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:35:33,520 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2020-10-26 19:35:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:33,930 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-10-26 19:35:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:35:33,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-26 19:35:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:33,932 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:35:33,932 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:35:33,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 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 19:35:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:35:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-10-26 19:35:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:35:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-26 19:35:33,943 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-26 19:35:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:33,943 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-26 19:35:33,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:35:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-26 19:35:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:35:33,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:33,944 INFO L422 BasicCegarLoop]: trace histogram [27, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:33,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:35:33,945 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash 691539456, now seen corresponding path program 28 times [2020-10-26 19:35:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:33,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652050530] [2020-10-26 19:35:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:33,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:33,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:35:38,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:35:38,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:39,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:39,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:39,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:39,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:39,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:35:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:39,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:35:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:39,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:39,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:39,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:35:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:39,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:39,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:39,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:39,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:39,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:39,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:39,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-26 19:35:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652050530] [2020-10-26 19:35:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:35:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184846085] [2020-10-26 19:35:39,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:35:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:35:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:35:39,670 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 31 states. [2020-10-26 19:35:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:39,917 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-26 19:35:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:35:39,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-26 19:35:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:39,919 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:35:39,919 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:35:39,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:35:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:35:39,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-26 19:35:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:35:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-26 19:35:39,930 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-26 19:35:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:39,931 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-26 19:35:39,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:35:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-26 19:35:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:35:39,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:39,932 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:39,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:35:39,932 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 849643442, now seen corresponding path program 29 times [2020-10-26 19:35:39,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:39,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643953230] [2020-10-26 19:35:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:39,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:39,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:35:44,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:44,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:35:44,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:45,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:45,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:45,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:45,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:35:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:35:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:45,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:45,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:45,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:45,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:35:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:45,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:45,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:45,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:45,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:45,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:35:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:45,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:45,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:45,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:45,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:45,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:35:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:45,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:35:45,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2020-10-26 19:35:45,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643953230] [2020-10-26 19:35:45,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:45,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:35:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280020489] [2020-10-26 19:35:45,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:35:45,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:35:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:35:45,283 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 16 states. [2020-10-26 19:35:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:45,940 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-10-26 19:35:45,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:35:45,941 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-26 19:35:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:45,942 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:35:45,942 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:35:45,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:35:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:35:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-10-26 19:35:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:35:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-26 19:35:45,956 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 70 [2020-10-26 19:35:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:45,956 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-26 19:35:45,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:35:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-26 19:35:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:35:45,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:45,957 INFO L422 BasicCegarLoop]: trace histogram [28, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:45,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:35:45,957 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2037273279, now seen corresponding path program 30 times [2020-10-26 19:35:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:45,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057774343] [2020-10-26 19:35:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:46,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:50,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:50,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:35:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:51,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:51,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:51,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:51,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 19:35:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:51,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:51,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:51,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:35:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:51,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:51,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:51,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:51,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:51,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:51,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:51,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:35:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:51,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:51,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:51,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:35:51,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:51,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:51,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:51,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 6 proven. 406 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:35:51,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057774343] [2020-10-26 19:35:51,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:51,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:35:51,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926729258] [2020-10-26 19:35:51,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:35:51,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:51,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:35:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:35:51,696 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 32 states. [2020-10-26 19:35:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:52,072 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2020-10-26 19:35:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:35:52,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-26 19:35:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:52,081 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:35:52,081 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:35:52,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 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 19:35:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:35:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-10-26 19:35:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:35:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2020-10-26 19:35:52,095 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 71 [2020-10-26 19:35:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:52,095 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2020-10-26 19:35:52,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:35:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2020-10-26 19:35:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:35:52,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:52,096 INFO L422 BasicCegarLoop]: trace histogram [29, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:52,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:35:52,097 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash -423198093, now seen corresponding path program 31 times [2020-10-26 19:35:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:52,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245711518] [2020-10-26 19:35:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:52,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:52,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:35:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:35:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:35:57,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:35:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:35:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:35:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:35:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:35:57,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:35:57,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:35:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:35:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:35:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:35:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:57,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:35:57,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:35:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 6 proven. 435 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:35:57,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245711518] [2020-10-26 19:35:57,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:35:57,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:35:57,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538717971] [2020-10-26 19:35:57,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:35:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:35:57,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:35:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:35:57,851 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand 33 states. [2020-10-26 19:35:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:35:58,191 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2020-10-26 19:35:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:35:58,191 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-26 19:35:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:35:58,192 INFO L225 Difference]: With dead ends: 151 [2020-10-26 19:35:58,192 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:35:58,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:35:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:35:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-26 19:35:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:35:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-10-26 19:35:58,207 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 72 [2020-10-26 19:35:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:35:58,207 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-10-26 19:35:58,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:35:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-10-26 19:35:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:35:58,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:35:58,208 INFO L422 BasicCegarLoop]: trace histogram [30, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:35:58,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:35:58,209 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:35:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:35:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1926474879, now seen corresponding path program 32 times [2020-10-26 19:35:58,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:35:58,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703753660] [2020-10-26 19:35:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:35:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:35:58,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:35:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:36:03,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:03,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:36:03,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:04,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:04,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:04,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:04,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:04,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:04,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:04,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:04,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:04,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:04,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:36:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:04,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:04,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:04,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:04,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:36:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:04,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:04,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:04,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:04,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:04,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:04,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:04,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:04,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:36:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:04,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:04,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:04,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:04,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:04,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:04,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:04,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:04,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 6 proven. 465 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703753660] [2020-10-26 19:36:04,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:04,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:36:04,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290174561] [2020-10-26 19:36:04,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:36:04,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:36:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:36:04,079 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 34 states. [2020-10-26 19:36:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:04,444 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-10-26 19:36:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:36:04,445 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 73 [2020-10-26 19:36:04,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:04,446 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:36:04,446 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:36:04,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 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 19:36:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:36:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-26 19:36:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:36:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-10-26 19:36:04,461 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 73 [2020-10-26 19:36:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:04,462 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-10-26 19:36:04,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:36:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-10-26 19:36:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:36:04,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:04,463 INFO L422 BasicCegarLoop]: trace histogram [31, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:04,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:36:04,463 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1283414989, now seen corresponding path program 33 times [2020-10-26 19:36:04,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:04,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193896782] [2020-10-26 19:36:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:04,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:09,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:36:09,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:10,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:10,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:36:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:10,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:36:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:36:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:10,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:10,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:10,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:10,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:10,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:10,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:10,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:10,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:10,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 6 proven. 496 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:10,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193896782] [2020-10-26 19:36:10,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:10,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:36:10,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149208290] [2020-10-26 19:36:10,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:36:10,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:36:10,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:10,432 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 35 states. [2020-10-26 19:36:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:10,855 INFO L93 Difference]: Finished difference Result 153 states and 166 transitions. [2020-10-26 19:36:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:36:10,856 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-26 19:36:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:10,857 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:36:10,857 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:36:10,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:36:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:36:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-26 19:36:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:36:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-26 19:36:10,871 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 74 [2020-10-26 19:36:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:10,872 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-26 19:36:10,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:36:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-26 19:36:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:36:10,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:10,873 INFO L422 BasicCegarLoop]: trace histogram [32, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:10,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:36:10,873 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1471572417, now seen corresponding path program 34 times [2020-10-26 19:36:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:10,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560670727] [2020-10-26 19:36:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:15,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:15,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:36:15,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:15,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:36:15,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:15,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:36:15,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:15,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:36:15,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-26 19:36:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:16,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:36:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:36:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:16,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:16,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 6 proven. 528 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560670727] [2020-10-26 19:36:16,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:16,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:36:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116365899] [2020-10-26 19:36:16,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:36:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:16,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:36:16,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:36:16,810 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 36 states. [2020-10-26 19:36:17,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:17,263 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2020-10-26 19:36:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:36:17,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 75 [2020-10-26 19:36:17,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:17,264 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:36:17,264 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:36:17,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 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 19:36:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:36:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-10-26 19:36:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:36:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-26 19:36:17,277 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 75 [2020-10-26 19:36:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:17,277 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-26 19:36:17,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:36:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-26 19:36:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:36:17,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:17,278 INFO L422 BasicCegarLoop]: trace histogram [33, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:17,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:36:17,279 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash 976836083, now seen corresponding path program 35 times [2020-10-26 19:36:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:17,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123354493] [2020-10-26 19:36:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:17,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:36:22,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:36:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:36:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:36:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:23,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:23,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 6 proven. 561 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:23,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123354493] [2020-10-26 19:36:23,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:23,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:36:23,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724469896] [2020-10-26 19:36:23,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:36:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:36:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:23,284 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 37 states. [2020-10-26 19:36:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:23,781 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2020-10-26 19:36:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:36:23,782 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2020-10-26 19:36:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:23,783 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:36:23,784 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:36:23,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:36:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:36:23,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2020-10-26 19:36:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:36:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-26 19:36:23,792 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-10-26 19:36:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:23,792 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-26 19:36:23,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:36:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-26 19:36:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:36:23,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:23,793 INFO L422 BasicCegarLoop]: trace histogram [34, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:23,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:36:23,793 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1475088383, now seen corresponding path program 36 times [2020-10-26 19:36:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:23,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847036425] [2020-10-26 19:36:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:23,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:23,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:28,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:28,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:36:28,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:29,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:29,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:29,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:29,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:29,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:29,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:29,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:29,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:29,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:29,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:29,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:36:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:29,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:29,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:29,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:36:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:29,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:29,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:29,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:29,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:29,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:29,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:29,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:29,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:29,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:29,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:29,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:36:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:29,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:29,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:29,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:29,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 6 proven. 595 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:29,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847036425] [2020-10-26 19:36:29,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:29,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:36:29,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901822305] [2020-10-26 19:36:29,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:36:29,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:36:29,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:36:29,817 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2020-10-26 19:36:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:30,310 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-10-26 19:36:30,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:36:30,311 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2020-10-26 19:36:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:30,312 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:36:30,312 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:36:30,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 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 19:36:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:36:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-26 19:36:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:36:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-26 19:36:30,321 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-10-26 19:36:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:30,321 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-26 19:36:30,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:36:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-26 19:36:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:36:30,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:30,322 INFO L422 BasicCegarLoop]: trace histogram [35, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:30,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:36:30,322 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:30,323 INFO L82 PathProgramCache]: Analyzing trace with hash -175335501, now seen corresponding path program 37 times [2020-10-26 19:36:30,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:30,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282745054] [2020-10-26 19:36:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:30,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:30,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:35,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:36:35,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:36,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:36:36,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:36,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:36:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:36,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:36:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:36,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:36:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:36,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 6 proven. 630 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:36,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282745054] [2020-10-26 19:36:36,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:36,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:36:36,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112726441] [2020-10-26 19:36:36,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:36:36,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:36:36,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:36:36,426 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 39 states. [2020-10-26 19:36:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:36,934 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-26 19:36:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:36:36,935 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 78 [2020-10-26 19:36:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:36,936 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:36:36,936 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:36:36,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:36:36,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:36:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-26 19:36:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:36:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-26 19:36:36,946 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-10-26 19:36:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:36,946 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-26 19:36:36,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:36:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-26 19:36:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:36:36,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:36,947 INFO L422 BasicCegarLoop]: trace histogram [36, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:36,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:36:36,947 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1462298177, now seen corresponding path program 38 times [2020-10-26 19:36:36,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:36,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610268041] [2020-10-26 19:36:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:36,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:37,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:41,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:36:41,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:43,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:43,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:43,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:43,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:43,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:43,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:43,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:43,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:43,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:43,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:43,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-26 19:36:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:43,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:43,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:43,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:43,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:43,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:43,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:43,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:43,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:43,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:36:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:43,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:36:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:43,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:43,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:43,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:43,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:43,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:43,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:43,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:43,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:43,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:43,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 6 proven. 666 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:43,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610268041] [2020-10-26 19:36:43,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:43,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:36:43,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96647869] [2020-10-26 19:36:43,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:36:43,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:36:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:36:43,103 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 40 states. [2020-10-26 19:36:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:43,563 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2020-10-26 19:36:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:36:43,564 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2020-10-26 19:36:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:43,565 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:36:43,565 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:36:43,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 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 19:36:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:36:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-10-26 19:36:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:36:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-26 19:36:43,573 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-10-26 19:36:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:43,574 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-26 19:36:43,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:36:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-26 19:36:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:36:43,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:43,575 INFO L422 BasicCegarLoop]: trace histogram [37, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:43,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:36:43,575 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 689334643, now seen corresponding path program 39 times [2020-10-26 19:36:43,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:43,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951640416] [2020-10-26 19:36:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:43,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:44,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:48,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:48,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:36:48,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:49,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:49,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:49,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:49,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:49,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:36:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:49,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:49,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:49,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:49,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:49,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:49,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:49,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:49,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:49,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:49,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:36:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:49,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:49,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:36:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:49,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:49,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:49,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:49,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:49,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:49,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:49,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:49,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:49,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:49,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 6 proven. 703 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:49,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951640416] [2020-10-26 19:36:49,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:49,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:36:49,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191324409] [2020-10-26 19:36:49,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:36:49,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:36:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:36:49,796 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 41 states. [2020-10-26 19:36:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:50,287 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-26 19:36:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:36:50,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-10-26 19:36:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:50,289 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:36:50,289 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:36:50,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 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 19:36:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:36:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2020-10-26 19:36:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:36:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-26 19:36:50,301 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 80 [2020-10-26 19:36:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:50,301 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-26 19:36:50,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:36:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-26 19:36:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:36:50,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:50,302 INFO L422 BasicCegarLoop]: trace histogram [38, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:50,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:36:50,302 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:50,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1797698431, now seen corresponding path program 40 times [2020-10-26 19:36:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:50,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680517233] [2020-10-26 19:36:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:50,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:50,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:55,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:55,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:36:55,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:36:55,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:36:55,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:36:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:36:55,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:36:55,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:56,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:36:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:56,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:56,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:56,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:36:56,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:56,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:56,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:56,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:56,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:36:56,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:56,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:56,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:36:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:56,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:56,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:56,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:56,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:56,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:36:56,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:56,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:56,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:56,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:56,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:56,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:36:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:56,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:56,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:56,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:56,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-26 19:36:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:56,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:36:56,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:36:56,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:36:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:36:56,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:36:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:36:56,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:36:56,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:36:56,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:36:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 6 proven. 741 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:36:56,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680517233] [2020-10-26 19:36:56,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:36:56,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:36:56,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568555565] [2020-10-26 19:36:56,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:36:56,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:36:56,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:36:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:36:56,570 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 42 states. [2020-10-26 19:36:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:36:57,060 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2020-10-26 19:36:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:36:57,061 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 81 [2020-10-26 19:36:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:36:57,062 INFO L225 Difference]: With dead ends: 131 [2020-10-26 19:36:57,062 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:36:57,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:36:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:36:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2020-10-26 19:36:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:36:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-26 19:36:57,074 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-26 19:36:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:36:57,075 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-26 19:36:57,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:36:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-26 19:36:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:36:57,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:36:57,076 INFO L422 BasicCegarLoop]: trace histogram [39, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:36:57,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-26 19:36:57,076 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:36:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:36:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1586312397, now seen corresponding path program 41 times [2020-10-26 19:36:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:36:57,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545372981] [2020-10-26 19:36:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:36:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:36:57,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:36:57,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:37:02,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:03,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:03,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:03,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:03,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:37:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:03,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:03,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:03,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:03,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:37:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:03,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:03,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:03,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:37:03,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:03,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:03,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:03,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:37:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:03,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:03,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:03,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:03,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:37:03,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:03,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 6 proven. 780 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:37:03,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545372981] [2020-10-26 19:37:03,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:03,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:37:03,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962793316] [2020-10-26 19:37:03,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:37:03,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:37:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:37:03,462 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 43 states. [2020-10-26 19:37:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:03,834 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-26 19:37:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:37:03,835 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2020-10-26 19:37:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:03,837 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:37:03,837 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:37:03,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:37:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:37:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2020-10-26 19:37:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:37:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-26 19:37:03,847 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2020-10-26 19:37:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:03,847 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-26 19:37:03,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:37:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-26 19:37:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:37:03,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:03,848 INFO L422 BasicCegarLoop]: trace histogram [40, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:03,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-26 19:37:03,849 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash 671687361, now seen corresponding path program 42 times [2020-10-26 19:37:03,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:03,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538555544] [2020-10-26 19:37:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:04,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:37:08,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:37:08,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:10,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:10,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-26 19:37:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:10,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:10,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:10,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:37:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:10,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:37:10,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:10,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:37:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:10,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:10,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 6 proven. 820 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:37:10,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538555544] [2020-10-26 19:37:10,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:10,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:37:10,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579063915] [2020-10-26 19:37:10,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:37:10,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:10,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:37:10,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:37:10,281 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 44 states. [2020-10-26 19:37:10,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:10,864 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2020-10-26 19:37:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:37:10,865 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 83 [2020-10-26 19:37:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:10,866 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:37:10,867 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:37:10,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:37:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:37:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-26 19:37:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:37:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-26 19:37:10,881 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2020-10-26 19:37:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:10,882 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-26 19:37:10,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:37:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-26 19:37:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:37:10,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:10,884 INFO L422 BasicCegarLoop]: trace histogram [41, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:10,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-26 19:37:10,884 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1950203123, now seen corresponding path program 43 times [2020-10-26 19:37:10,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:10,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355374030] [2020-10-26 19:37:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:10,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:10,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:15,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:15,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:37:15,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:37:15,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:37:15,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:15,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:37:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:37:15,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 19:37:15,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:17,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:37:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:17,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:17,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:17,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:17,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:37:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:17,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:17,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:17,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 19:37:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:17,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:17,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:17,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:17,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:17,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:17,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:17,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:17,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:37:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:17,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:17,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:37:17,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:37:17,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:37:17,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:37:17,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:37:17,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:37:17,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:37:17,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:37:17,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:37:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 6 proven. 861 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 19:37:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355374030] [2020-10-26 19:37:17,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:37:17,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:37:17,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168392827] [2020-10-26 19:37:17,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:37:17,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:37:17,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:37:17,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:37:17,383 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 45 states. [2020-10-26 19:37:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:37:18,051 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2020-10-26 19:37:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:37:18,052 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 84 [2020-10-26 19:37:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:37:18,054 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:37:18,054 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:37:18,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:37:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:37:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-10-26 19:37:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:37:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-26 19:37:18,065 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 84 [2020-10-26 19:37:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:37:18,065 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-26 19:37:18,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:37:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-26 19:37:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:37:18,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:37:18,066 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:37:18,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-26 19:37:18,066 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:37:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:37:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1986660910, now seen corresponding path program 44 times [2020-10-26 19:37:18,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:37:18,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341112851] [2020-10-26 19:37:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:37:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:37:18,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:37:18,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking...