/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_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:21,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:21,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:21,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:21,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:21,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:21,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:21,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:21,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:21,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:21,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:21,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:21,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:21,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:21,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:21,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:21,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:21,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:21,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:21,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:21,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:21,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:21,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:21,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:21,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:21,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:21,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:21,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:21,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:21,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:21,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:21,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:21,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:21,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:21,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:21,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:21,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:21,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:21,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:21,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:21,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:21,374 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 19:29:21,429 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:21,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:21,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:21,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:21,434 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:21,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:21,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:21,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:21,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:21,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:21,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:21,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:21,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:21,438 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:21,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:21,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:21,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:21,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:21,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:21,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:21,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:21,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:21,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:21,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:21,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:21,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:21,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:21,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:21,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:21,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:21,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:21,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:21,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:21,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:21,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:21,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-26 19:29:22,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dadce98e/a7dacff888a543c09a5398d53fbaa144/FLAGeb8e61d12 [2020-10-26 19:29:22,761 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:22,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-26 19:29:22,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dadce98e/a7dacff888a543c09a5398d53fbaa144/FLAGeb8e61d12 [2020-10-26 19:29:23,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dadce98e/a7dacff888a543c09a5398d53fbaa144 [2020-10-26 19:29:23,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:23,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:23,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:23,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:23,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:23,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c4053e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23, skipping insertion in model container [2020-10-26 19:29:23,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:23,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:23,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:23,361 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:23,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:23,404 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:23,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23 WrapperNode [2020-10-26 19:29:23,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:23,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:23,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:23,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:23,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (1/1) ... [2020-10-26 19:29:23,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:23,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:23,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:23,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:23,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (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 19:29:23,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:23,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:23,520 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:23,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:23,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:23,984 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:23,985 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:29:23,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:23 BoogieIcfgContainer [2020-10-26 19:29:23,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:23,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:23,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:23,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:23,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:23" (1/3) ... [2020-10-26 19:29:23,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7950454c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:23, skipping insertion in model container [2020-10-26 19:29:23,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:23" (2/3) ... [2020-10-26 19:29:23,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7950454c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:23, skipping insertion in model container [2020-10-26 19:29:23,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:23" (3/3) ... [2020-10-26 19:29:23,996 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2020-10-26 19:29:24,009 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:24,014 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:24,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:24,057 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:24,058 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:24,058 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:24,058 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:24,058 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:24,058 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:24,058 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:24,059 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 19:29:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:24,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:24,089 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 19:29:24,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash -573141084, now seen corresponding path program 1 times [2020-10-26 19:29:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:24,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394016489] [2020-10-26 19:29:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:24,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:24,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-26 19:29:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:29:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:29:24,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:24,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:29:24,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,973 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 19:29:24,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394016489] [2020-10-26 19:29:24,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:24,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:29:24,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707031350] [2020-10-26 19:29:24,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:29:24,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:29:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:25,002 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-10-26 19:29:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:25,201 INFO L93 Difference]: Finished difference Result 72 states and 102 transitions. [2020-10-26 19:29:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:29:25,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:29:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:25,213 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:29:25,214 INFO L226 Difference]: Without dead ends: 37 [2020-10-26 19:29:25,217 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 19:29:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-26 19:29:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-10-26 19:29:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:29:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-26 19:29:25,301 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 17 [2020-10-26 19:29:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:25,301 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-26 19:29:25,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:29:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-26 19:29:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:29:25,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:25,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:25,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:25,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash 673590666, now seen corresponding path program 1 times [2020-10-26 19:29:25,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:25,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919677573] [2020-10-26 19:29:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:29:28,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:28,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2670 [2020-10-26 19:29:28,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:28,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:29:28,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:28,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:29:28,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:28,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:28,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:28,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:28,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919677573] [2020-10-26 19:29:28,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:28,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:28,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193731217] [2020-10-26 19:29:28,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:28,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:28,603 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 12 states. [2020-10-26 19:29:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:29,431 INFO L93 Difference]: Finished difference Result 107 states and 136 transitions. [2020-10-26 19:29:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:29:29,432 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-26 19:29:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:29,435 INFO L225 Difference]: With dead ends: 107 [2020-10-26 19:29:29,436 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:29:29,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:29:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:29:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2020-10-26 19:29:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:29:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-10-26 19:29:29,455 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 23 [2020-10-26 19:29:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:29,456 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-10-26 19:29:29,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:29,456 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-10-26 19:29:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:29:29,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:29,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:29,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:29,458 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1374655244, now seen corresponding path program 1 times [2020-10-26 19:29:29,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:29,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255823783] [2020-10-26 19:29:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:29:31,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:31,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2480 [2020-10-26 19:29:31,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:29:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:32,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:32,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:32,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:32,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:32,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:32,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:32,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:32,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255823783] [2020-10-26 19:29:32,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:32,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:32,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295174853] [2020-10-26 19:29:32,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:32,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:32,016 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 5 states. [2020-10-26 19:29:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:32,151 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2020-10-26 19:29:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:32,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:29:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:32,153 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:29:32,153 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:29:32,154 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 19:29:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:29:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-26 19:29:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:29:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-26 19:29:32,162 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 23 [2020-10-26 19:29:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:32,163 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-26 19:29:32,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-26 19:29:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:29:32,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:32,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:32,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:32,165 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:32,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1399951076, now seen corresponding path program 2 times [2020-10-26 19:29:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:32,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809796525] [2020-10-26 19:29:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:29:37,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:37,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:29:37,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:29:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:29:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:37,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:37,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:37,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:37,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:38,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809796525] [2020-10-26 19:29:38,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:38,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:29:38,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074119328] [2020-10-26 19:29:38,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:29:38,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:38,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:29:38,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:29:38,004 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 17 states. [2020-10-26 19:29:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:39,071 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2020-10-26 19:29:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:29:39,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-26 19:29:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:39,074 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:29:39,074 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:29:39,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:29:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:29:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 59. [2020-10-26 19:29:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:29:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-10-26 19:29:39,090 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2020-10-26 19:29:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:39,090 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-10-26 19:29:39,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:29:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-10-26 19:29:39,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:29:39,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:39,092 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 19:29:39,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:39,092 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash 388833826, now seen corresponding path program 1 times [2020-10-26 19:29:39,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:39,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352945375] [2020-10-26 19:29:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:44,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:29:44,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:29:44,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:29:44,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:44,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:44,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:44,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:29:44,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:44,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:44,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:44,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:44,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:44,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:44,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:44,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:44,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:44,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:29:44,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352945375] [2020-10-26 19:29:44,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:44,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:44,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761870932] [2020-10-26 19:29:44,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:44,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:44,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:44,191 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 6 states. [2020-10-26 19:29:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:44,351 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-26 19:29:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:44,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-26 19:29:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:44,353 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:29:44,353 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:29:44,354 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 19:29:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:29:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-10-26 19:29:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:29:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-26 19:29:44,372 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 29 [2020-10-26 19:29:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:44,373 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-26 19:29:44,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-26 19:29:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:29:44,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:44,378 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:44,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:44,380 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1175078986, now seen corresponding path program 3 times [2020-10-26 19:29:44,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:44,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374397959] [2020-10-26 19:29:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:44,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:44,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:48,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:49,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:49,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:29:49,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:49,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:29:49,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:29:49,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:49,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:49,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:49,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:49,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:49,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:49,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:49,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:49,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:29:49,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374397959] [2020-10-26 19:29:49,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:49,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:49,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322348908] [2020-10-26 19:29:49,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:49,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:49,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:49,505 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 7 states. [2020-10-26 19:29:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:49,648 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-26 19:29:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:49,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-26 19:29:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:49,650 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:29:49,651 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:29:49,651 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 19:29:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:29:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-26 19:29:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:29:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-26 19:29:49,669 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 35 [2020-10-26 19:29:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:49,669 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-26 19:29:49,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-26 19:29:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:29:49,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:49,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:49,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:49,674 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:49,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2028249564, now seen corresponding path program 4 times [2020-10-26 19:29:49,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:49,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123712131] [2020-10-26 19:29:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:49,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:49,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:50,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:54,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:54,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:29:54,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:29:54,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:55,083 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-26 19:29:55,241 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-26 19:29:55,407 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2020-10-26 19:29:56,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:56,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:56,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:56,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:56,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:56,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:56,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:56,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:56,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:56,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:29:56,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123712131] [2020-10-26 19:29:56,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:56,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:29:56,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218744345] [2020-10-26 19:29:56,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:29:56,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:56,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:29:56,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:29:56,585 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 21 states. [2020-10-26 19:29:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:58,106 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2020-10-26 19:29:58,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:29:58,107 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-10-26 19:29:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:58,109 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:29:58,110 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:29:58,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:29:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:29:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 83. [2020-10-26 19:29:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:29:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-10-26 19:29:58,124 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 41 [2020-10-26 19:29:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:58,125 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-10-26 19:29:58,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:29:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-10-26 19:29:58,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:29:58,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:58,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:58,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:58,127 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:58,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1449069282, now seen corresponding path program 2 times [2020-10-26 19:29:58,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:58,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452277972] [2020-10-26 19:29:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:58,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:58,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:03,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:30:03,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:30:03,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:30:03,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:30:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:30:03,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:03,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:03,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:03,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:03,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:30:03,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452277972] [2020-10-26 19:30:03,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:03,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:30:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129324502] [2020-10-26 19:30:03,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:30:03,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:30:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:30:03,224 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 8 states. [2020-10-26 19:30:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:03,404 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-10-26 19:30:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:30:03,405 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-26 19:30:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:03,406 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:30:03,406 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:30:03,407 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 19:30:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:30:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-26 19:30:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:30:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-10-26 19:30:03,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-10-26 19:30:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:03,415 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-10-26 19:30:03,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:30:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-10-26 19:30:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:03,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:03,417 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:03,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:30:03,417 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -383085814, now seen corresponding path program 5 times [2020-10-26 19:30:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:03,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630161367] [2020-10-26 19:30:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:04,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:08,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:08,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:30:08,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:30:08,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:08,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:30:08,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:08,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:30:08,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:09,092 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-10-26 19:30:09,254 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-26 19:30:09,391 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-26 19:30:10,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:10,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:10,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:10,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:10,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:10,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:10,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:10,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:30:10,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630161367] [2020-10-26 19:30:10,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:10,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:30:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447024775] [2020-10-26 19:30:10,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:30:10,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:10,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:30:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:10,434 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 22 states. [2020-10-26 19:30:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:11,712 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2020-10-26 19:30:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:30:11,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-26 19:30:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:11,714 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:30:11,714 INFO L226 Difference]: Without dead ends: 161 [2020-10-26 19:30:11,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:30:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-26 19:30:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 102. [2020-10-26 19:30:11,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:30:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 131 transitions. [2020-10-26 19:30:11,752 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 131 transitions. Word has length 47 [2020-10-26 19:30:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:11,753 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 131 transitions. [2020-10-26 19:30:11,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:30:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 131 transitions. [2020-10-26 19:30:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:11,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:11,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:11,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:30:11,759 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:11,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2106443148, now seen corresponding path program 3 times [2020-10-26 19:30:11,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:11,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939500967] [2020-10-26 19:30:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:12,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:12,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:16,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:30:16,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:17,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:17,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-26 19:30:17,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939500967] [2020-10-26 19:30:17,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:17,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:30:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86644376] [2020-10-26 19:30:17,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:30:17,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:30:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:30:17,090 INFO L87 Difference]: Start difference. First operand 102 states and 131 transitions. Second operand 11 states. [2020-10-26 19:30:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:17,412 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2020-10-26 19:30:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:30:17,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-26 19:30:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:17,417 INFO L225 Difference]: With dead ends: 163 [2020-10-26 19:30:17,417 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:30:17,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:30:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 105. [2020-10-26 19:30:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:30:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2020-10-26 19:30:17,431 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 47 [2020-10-26 19:30:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:17,431 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2020-10-26 19:30:17,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:30:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2020-10-26 19:30:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:17,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:17,432 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:17,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:30:17,433 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1596970058, now seen corresponding path program 1 times [2020-10-26 19:30:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:17,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825611835] [2020-10-26 19:30:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:22,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:22,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:30:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:22,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:22,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:22,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:22,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:22,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:22,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:22,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:22,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:22,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:22,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:22,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:30:22,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825611835] [2020-10-26 19:30:22,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:22,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:30:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428352293] [2020-10-26 19:30:22,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:30:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:30:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:22,773 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand 15 states. [2020-10-26 19:30:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:23,400 INFO L93 Difference]: Finished difference Result 204 states and 263 transitions. [2020-10-26 19:30:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:30:23,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-26 19:30:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:23,404 INFO L225 Difference]: With dead ends: 204 [2020-10-26 19:30:23,404 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:30:23,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:23,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:30:23,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 109. [2020-10-26 19:30:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:30:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2020-10-26 19:30:23,436 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 47 [2020-10-26 19:30:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:23,436 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2020-10-26 19:30:23,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:30:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2020-10-26 19:30:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:23,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:23,437 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:23,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:30:23,438 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1147749192, now seen corresponding path program 1 times [2020-10-26 19:30:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:23,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014240062] [2020-10-26 19:30:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:23,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:27,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:30:28,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:29,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:29,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:29,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:29,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:29,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:29,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:29,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:29,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:29,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:29,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:30:29,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014240062] [2020-10-26 19:30:29,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:29,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:29,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596203122] [2020-10-26 19:30:29,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:29,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:29,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:29,241 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand 19 states. [2020-10-26 19:30:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:30,733 INFO L93 Difference]: Finished difference Result 232 states and 301 transitions. [2020-10-26 19:30:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:30:30,734 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-26 19:30:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:30,737 INFO L225 Difference]: With dead ends: 232 [2020-10-26 19:30:30,737 INFO L226 Difference]: Without dead ends: 197 [2020-10-26 19:30:30,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:30:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-26 19:30:30,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 153. [2020-10-26 19:30:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-26 19:30:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2020-10-26 19:30:30,759 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 47 [2020-10-26 19:30:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:30,759 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2020-10-26 19:30:30,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2020-10-26 19:30:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:30,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:30,761 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:30,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:30:30,761 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash 136631942, now seen corresponding path program 1 times [2020-10-26 19:30:30,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:30,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326182114] [2020-10-26 19:30:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:34,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:34,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:35,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:35,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-26 19:30:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:30:35,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:30:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:30:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:36,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:36,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:36,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:36,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:36,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:36,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:30:36,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326182114] [2020-10-26 19:30:36,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:36,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:30:36,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033768184] [2020-10-26 19:30:36,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:30:36,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:30:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:36,998 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand 21 states. [2020-10-26 19:30:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:38,732 INFO L93 Difference]: Finished difference Result 309 states and 398 transitions. [2020-10-26 19:30:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:30:38,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-26 19:30:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:38,737 INFO L225 Difference]: With dead ends: 309 [2020-10-26 19:30:38,737 INFO L226 Difference]: Without dead ends: 247 [2020-10-26 19:30:38,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:30:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-26 19:30:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2020-10-26 19:30:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:30:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2020-10-26 19:30:38,765 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 47 [2020-10-26 19:30:38,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:38,766 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 233 transitions. [2020-10-26 19:30:38,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:30:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 233 transitions. [2020-10-26 19:30:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:38,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:38,767 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:38,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:30:38,767 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:38,768 INFO L82 PathProgramCache]: Analyzing trace with hash -657689142, now seen corresponding path program 2 times [2020-10-26 19:30:38,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:38,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686936535] [2020-10-26 19:30:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:39,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:39,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:39,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:43,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:43,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-26 19:30:43,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:30:43,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:30:43,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:43,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:30:43,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:44,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:44,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:44,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:44,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:44,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:44,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:44,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:44,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:30:44,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686936535] [2020-10-26 19:30:44,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:44,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:44,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155323438] [2020-10-26 19:30:44,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:44,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:44,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:44,305 INFO L87 Difference]: Start difference. First operand 182 states and 233 transitions. Second operand 19 states. [2020-10-26 19:30:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:45,430 INFO L93 Difference]: Finished difference Result 271 states and 346 transitions. [2020-10-26 19:30:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:30:45,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-26 19:30:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:45,433 INFO L225 Difference]: With dead ends: 271 [2020-10-26 19:30:45,434 INFO L226 Difference]: Without dead ends: 230 [2020-10-26 19:30:45,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:30:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-26 19:30:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 185. [2020-10-26 19:30:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:30:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 236 transitions. [2020-10-26 19:30:45,459 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 236 transitions. Word has length 47 [2020-10-26 19:30:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:45,459 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 236 transitions. [2020-10-26 19:30:45,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 236 transitions. [2020-10-26 19:30:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:45,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:45,460 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:45,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:30:45,461 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1037813002, now seen corresponding path program 3 times [2020-10-26 19:30:45,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:45,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047168758] [2020-10-26 19:30:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:45,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:50,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:50,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:50,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-26 19:30:50,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:30:50,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:50,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:50,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:30:50,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:50,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:50,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:50,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:50,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:50,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:50,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:50,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:50,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:50,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:50,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:30:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047168758] [2020-10-26 19:30:50,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:50,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:30:50,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633086965] [2020-10-26 19:30:50,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:30:50,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:50,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:30:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:50,739 INFO L87 Difference]: Start difference. First operand 185 states and 236 transitions. Second operand 14 states. [2020-10-26 19:30:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:51,275 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions. [2020-10-26 19:30:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:30:51,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-26 19:30:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:51,278 INFO L225 Difference]: With dead ends: 296 [2020-10-26 19:30:51,278 INFO L226 Difference]: Without dead ends: 237 [2020-10-26 19:30:51,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-26 19:30:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 185. [2020-10-26 19:30:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-26 19:30:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2020-10-26 19:30:51,302 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 47 [2020-10-26 19:30:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:51,303 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2020-10-26 19:30:51,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:30:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2020-10-26 19:30:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:51,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:51,304 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:51,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:30:51,304 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:51,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:51,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1808512454, now seen corresponding path program 4 times [2020-10-26 19:30:51,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:51,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816574210] [2020-10-26 19:30:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:51,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:52,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:55,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:55,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:56,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:30:56,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-26 19:30:56,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:30:56,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:56,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:30:56,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:56,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:30:56,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:56,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:56,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:56,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:56,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:56,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:56,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:56,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:56,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-26 19:30:56,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816574210] [2020-10-26 19:30:56,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:56,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:30:56,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174193507] [2020-10-26 19:30:56,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:30:56,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:30:56,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:30:56,667 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand 12 states. [2020-10-26 19:30:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:57,641 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2020-10-26 19:30:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:30:57,642 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-26 19:30:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:57,646 INFO L225 Difference]: With dead ends: 390 [2020-10-26 19:30:57,646 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 19:30:57,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:30:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 19:30:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 268. [2020-10-26 19:30:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-26 19:30:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 340 transitions. [2020-10-26 19:30:57,693 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 340 transitions. Word has length 47 [2020-10-26 19:30:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:57,693 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 340 transitions. [2020-10-26 19:30:57,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:30:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 340 transitions. [2020-10-26 19:30:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:30:57,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:57,694 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:57,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:57,695 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1785390264, now seen corresponding path program 5 times [2020-10-26 19:30:57,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:57,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480720410] [2020-10-26 19:30:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:57,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:02,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:31:02,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:31:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:31:02,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:31:02,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:02,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:31:02,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:02,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:02,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:02,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:02,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:02,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:02,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:02,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:31:02,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480720410] [2020-10-26 19:31:02,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:02,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:31:02,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465885034] [2020-10-26 19:31:02,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:31:02,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:31:02,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:31:02,812 INFO L87 Difference]: Start difference. First operand 268 states and 340 transitions. Second operand 9 states. [2020-10-26 19:31:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:03,020 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2020-10-26 19:31:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:31:03,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-26 19:31:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:03,023 INFO L225 Difference]: With dead ends: 457 [2020-10-26 19:31:03,023 INFO L226 Difference]: Without dead ends: 290 [2020-10-26 19:31:03,024 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 19:31:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-26 19:31:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 230. [2020-10-26 19:31:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-26 19:31:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 298 transitions. [2020-10-26 19:31:03,061 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 298 transitions. Word has length 47 [2020-10-26 19:31:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:03,061 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 298 transitions. [2020-10-26 19:31:03,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:31:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 298 transitions. [2020-10-26 19:31:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:31:03,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:03,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:03,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:31:03,063 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:03,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1229164444, now seen corresponding path program 6 times [2020-10-26 19:31:03,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:03,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377128990] [2020-10-26 19:31:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:03,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:05,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:08,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:31:08,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:08,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:08,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:08,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:08,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:08,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 59 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 19:31:08,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377128990] [2020-10-26 19:31:08,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:08,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:31:08,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174734978] [2020-10-26 19:31:08,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:31:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:31:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:31:08,694 INFO L87 Difference]: Start difference. First operand 230 states and 298 transitions. Second operand 16 states. [2020-10-26 19:31:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:09,692 INFO L93 Difference]: Finished difference Result 339 states and 441 transitions. [2020-10-26 19:31:09,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:31:09,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-26 19:31:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:09,695 INFO L225 Difference]: With dead ends: 339 [2020-10-26 19:31:09,695 INFO L226 Difference]: Without dead ends: 272 [2020-10-26 19:31:09,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:31:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-26 19:31:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 250. [2020-10-26 19:31:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-26 19:31:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 321 transitions. [2020-10-26 19:31:09,729 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 321 transitions. Word has length 53 [2020-10-26 19:31:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:09,729 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 321 transitions. [2020-10-26 19:31:09,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:31:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 321 transitions. [2020-10-26 19:31:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:31:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:09,730 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:09,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:31:09,731 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2116447768, now seen corresponding path program 7 times [2020-10-26 19:31:09,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:09,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607382774] [2020-10-26 19:31:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:09,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:11,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:31:14,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:15,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:15,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:15,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:15,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 19:31:15,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607382774] [2020-10-26 19:31:15,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:15,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:31:15,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287323057] [2020-10-26 19:31:15,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:31:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:31:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:31:15,749 INFO L87 Difference]: Start difference. First operand 250 states and 321 transitions. Second operand 21 states. [2020-10-26 19:31:17,907 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-26 19:31:18,138 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-26 19:31:19,642 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-10-26 19:31:20,100 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-26 19:31:20,668 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2020-10-26 19:31:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:20,906 INFO L93 Difference]: Finished difference Result 527 states and 691 transitions. [2020-10-26 19:31:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:31:20,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-26 19:31:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:20,909 INFO L225 Difference]: With dead ends: 527 [2020-10-26 19:31:20,910 INFO L226 Difference]: Without dead ends: 502 [2020-10-26 19:31:20,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=858, Invalid=4254, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:31:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-26 19:31:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 416. [2020-10-26 19:31:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-26 19:31:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 551 transitions. [2020-10-26 19:31:20,974 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 551 transitions. Word has length 53 [2020-10-26 19:31:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:20,974 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 551 transitions. [2020-10-26 19:31:20,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:31:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 551 transitions. [2020-10-26 19:31:20,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:31:20,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:20,976 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:20,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:31:20,977 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1167402278, now seen corresponding path program 8 times [2020-10-26 19:31:20,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:20,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301429572] [2020-10-26 19:31:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:25,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:31:25,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:31:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:31:25,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:31:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:25,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:31:25,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:26,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:31:26,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301429572] [2020-10-26 19:31:26,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:26,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:31:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462607002] [2020-10-26 19:31:26,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:31:26,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:31:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:31:26,244 INFO L87 Difference]: Start difference. First operand 416 states and 551 transitions. Second operand 15 states. [2020-10-26 19:31:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:26,852 INFO L93 Difference]: Finished difference Result 583 states and 775 transitions. [2020-10-26 19:31:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:31:26,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-26 19:31:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:26,856 INFO L225 Difference]: With dead ends: 583 [2020-10-26 19:31:26,856 INFO L226 Difference]: Without dead ends: 454 [2020-10-26 19:31:26,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:31:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-26 19:31:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 428. [2020-10-26 19:31:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-26 19:31:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 567 transitions. [2020-10-26 19:31:26,932 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 567 transitions. Word has length 53 [2020-10-26 19:31:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:26,932 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 567 transitions. [2020-10-26 19:31:26,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:31:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 567 transitions. [2020-10-26 19:31:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:31:26,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:26,934 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:26,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:31:26,935 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1360871078, now seen corresponding path program 9 times [2020-10-26 19:31:26,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:26,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576419171] [2020-10-26 19:31:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:31:31,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:32,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:32,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:32,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:32,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:32,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:32,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 23 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:31:32,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576419171] [2020-10-26 19:31:32,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:32,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:31:32,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293044609] [2020-10-26 19:31:32,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:31:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:31:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:31:32,310 INFO L87 Difference]: Start difference. First operand 428 states and 567 transitions. Second operand 18 states. [2020-10-26 19:31:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:33,492 INFO L93 Difference]: Finished difference Result 716 states and 953 transitions. [2020-10-26 19:31:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:31:33,492 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2020-10-26 19:31:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:33,496 INFO L225 Difference]: With dead ends: 716 [2020-10-26 19:31:33,496 INFO L226 Difference]: Without dead ends: 570 [2020-10-26 19:31:33,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:31:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-26 19:31:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 503. [2020-10-26 19:31:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-10-26 19:31:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 662 transitions. [2020-10-26 19:31:33,582 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 662 transitions. Word has length 53 [2020-10-26 19:31:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:33,582 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 662 transitions. [2020-10-26 19:31:33,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:31:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 662 transitions. [2020-10-26 19:31:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:31:33,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:33,584 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:33,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:31:33,585 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 349753828, now seen corresponding path program 1 times [2020-10-26 19:31:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042763041] [2020-10-26 19:31:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:33,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:33,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:33,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2007 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:31:35,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:35,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:35,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-26 19:31:35,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042763041] [2020-10-26 19:31:35,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:31:35,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:31:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737349873] [2020-10-26 19:31:35,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:31:35,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:31:35,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:31:35,661 INFO L87 Difference]: Start difference. First operand 503 states and 662 transitions. Second operand 5 states. [2020-10-26 19:31:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:35,848 INFO L93 Difference]: Finished difference Result 526 states and 689 transitions. [2020-10-26 19:31:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:31:35,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-26 19:31:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:35,854 INFO L225 Difference]: With dead ends: 526 [2020-10-26 19:31:35,854 INFO L226 Difference]: Without dead ends: 509 [2020-10-26 19:31:35,854 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 19:31:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-26 19:31:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 504. [2020-10-26 19:31:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-26 19:31:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 663 transitions. [2020-10-26 19:31:35,928 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 663 transitions. Word has length 53 [2020-10-26 19:31:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:35,929 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 663 transitions. [2020-10-26 19:31:35,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:31:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 663 transitions. [2020-10-26 19:31:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:31:35,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:35,930 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:35,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:31:35,930 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:35,931 INFO L82 PathProgramCache]: Analyzing trace with hash -473060536, now seen corresponding path program 1 times [2020-10-26 19:31:35,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:35,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856653615] [2020-10-26 19:31:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:35,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:35,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:31:40,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:40,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:31:40,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:41,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:41,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:41,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:31:41,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856653615] [2020-10-26 19:31:41,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:41,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:31:41,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773588372] [2020-10-26 19:31:41,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:31:41,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:31:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:31:41,044 INFO L87 Difference]: Start difference. First operand 504 states and 663 transitions. Second operand 10 states. [2020-10-26 19:31:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:41,354 INFO L93 Difference]: Finished difference Result 984 states and 1312 transitions. [2020-10-26 19:31:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:31:41,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-26 19:31:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:41,358 INFO L225 Difference]: With dead ends: 984 [2020-10-26 19:31:41,358 INFO L226 Difference]: Without dead ends: 659 [2020-10-26 19:31:41,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:31:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-26 19:31:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 516. [2020-10-26 19:31:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-26 19:31:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 682 transitions. [2020-10-26 19:31:41,445 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 682 transitions. Word has length 55 [2020-10-26 19:31:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:41,445 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 682 transitions. [2020-10-26 19:31:41,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:31:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 682 transitions. [2020-10-26 19:31:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:31:41,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:41,447 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:41,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:31:41,447 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash 108411438, now seen corresponding path program 2 times [2020-10-26 19:31:41,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:41,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429855616] [2020-10-26 19:31:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:31:46,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:46,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:46,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:46,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:46,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:46,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:46,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:46,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:46,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:46,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:46,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:46,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:31:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429855616] [2020-10-26 19:31:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:46,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:31:46,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575498193] [2020-10-26 19:31:46,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:31:46,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:31:46,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:31:46,584 INFO L87 Difference]: Start difference. First operand 516 states and 682 transitions. Second operand 11 states. [2020-10-26 19:31:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:46,872 INFO L93 Difference]: Finished difference Result 1164 states and 1554 transitions. [2020-10-26 19:31:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:31:46,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-10-26 19:31:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:46,878 INFO L225 Difference]: With dead ends: 1164 [2020-10-26 19:31:46,879 INFO L226 Difference]: Without dead ends: 770 [2020-10-26 19:31:46,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:31:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-10-26 19:31:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 589. [2020-10-26 19:31:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-10-26 19:31:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 778 transitions. [2020-10-26 19:31:46,970 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 778 transitions. Word has length 61 [2020-10-26 19:31:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:46,971 INFO L481 AbstractCegarLoop]: Abstraction has 589 states and 778 transitions. [2020-10-26 19:31:46,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:31:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 778 transitions. [2020-10-26 19:31:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:31:46,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:46,973 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:46,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:31:46,973 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1782429048, now seen corresponding path program 3 times [2020-10-26 19:31:46,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:46,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939370441] [2020-10-26 19:31:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:51,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:51,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:31:51,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:31:51,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:31:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:31:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:52,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:52,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 77 proven. 15 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:31:52,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939370441] [2020-10-26 19:31:52,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:52,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:31:52,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810352013] [2020-10-26 19:31:52,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:31:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:31:52,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:31:52,142 INFO L87 Difference]: Start difference. First operand 589 states and 778 transitions. Second operand 13 states. [2020-10-26 19:31:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:53,030 INFO L93 Difference]: Finished difference Result 2917 states and 3924 transitions. [2020-10-26 19:31:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:31:53,031 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-26 19:31:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:53,043 INFO L225 Difference]: With dead ends: 2917 [2020-10-26 19:31:53,043 INFO L226 Difference]: Without dead ends: 2904 [2020-10-26 19:31:53,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:31:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2020-10-26 19:31:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1068. [2020-10-26 19:31:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-10-26 19:31:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1436 transitions. [2020-10-26 19:31:53,236 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1436 transitions. Word has length 67 [2020-10-26 19:31:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:53,237 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1436 transitions. [2020-10-26 19:31:53,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:31:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1436 transitions. [2020-10-26 19:31:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:31:53,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:53,241 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:53,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:31:53,241 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 667171082, now seen corresponding path program 1 times [2020-10-26 19:31:53,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:53,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074864441] [2020-10-26 19:31:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:53,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:55,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:58,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:58,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:31:58,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:31:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:31:58,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:31:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:31:58,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:00,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:00,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 15 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:00,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074864441] [2020-10-26 19:32:00,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:00,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:32:00,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935186208] [2020-10-26 19:32:00,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:32:00,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:00,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:32:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:32:00,234 INFO L87 Difference]: Start difference. First operand 1068 states and 1436 transitions. Second operand 29 states. [2020-10-26 19:32:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:04,160 INFO L93 Difference]: Finished difference Result 1508 states and 2039 transitions. [2020-10-26 19:32:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:32:04,160 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-26 19:32:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:04,166 INFO L225 Difference]: With dead ends: 1508 [2020-10-26 19:32:04,166 INFO L226 Difference]: Without dead ends: 1361 [2020-10-26 19:32:04,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=107, Invalid=1453, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-10-26 19:32:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1304. [2020-10-26 19:32:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2020-10-26 19:32:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1758 transitions. [2020-10-26 19:32:04,374 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1758 transitions. Word has length 67 [2020-10-26 19:32:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:04,375 INFO L481 AbstractCegarLoop]: Abstraction has 1304 states and 1758 transitions. [2020-10-26 19:32:04,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:32:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1758 transitions. [2020-10-26 19:32:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:32:04,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:04,379 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:04,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:32:04,379 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:04,379 INFO L82 PathProgramCache]: Analyzing trace with hash 80365068, now seen corresponding path program 1 times [2020-10-26 19:32:04,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:04,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485381334] [2020-10-26 19:32:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:04,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:32:09,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:09,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:09,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:09,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:09,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:09,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:09,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:09,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:09,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:09,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:32:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485381334] [2020-10-26 19:32:09,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:09,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:32:09,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134572580] [2020-10-26 19:32:09,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:32:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:32:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:32:09,545 INFO L87 Difference]: Start difference. First operand 1304 states and 1758 transitions. Second operand 12 states. [2020-10-26 19:32:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:09,954 INFO L93 Difference]: Finished difference Result 2150 states and 2904 transitions. [2020-10-26 19:32:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:32:09,954 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-26 19:32:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:09,960 INFO L225 Difference]: With dead ends: 2150 [2020-10-26 19:32:09,960 INFO L226 Difference]: Without dead ends: 1625 [2020-10-26 19:32:09,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:32:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2020-10-26 19:32:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1190. [2020-10-26 19:32:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-10-26 19:32:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1596 transitions. [2020-10-26 19:32:10,156 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1596 transitions. Word has length 67 [2020-10-26 19:32:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:10,157 INFO L481 AbstractCegarLoop]: Abstraction has 1190 states and 1596 transitions. [2020-10-26 19:32:10,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:32:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1596 transitions. [2020-10-26 19:32:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:32:10,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:10,160 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:10,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:32:10,161 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash -800119762, now seen corresponding path program 2 times [2020-10-26 19:32:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:10,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208767544] [2020-10-26 19:32:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:10,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:15,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:15,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:32:15,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:32:15,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:32:15,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:15,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:32:15,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:15,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:32:15,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:15,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 38 proven. 192 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:32:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208767544] [2020-10-26 19:32:15,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:15,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:32:15,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801607162] [2020-10-26 19:32:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:32:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:32:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:32:15,926 INFO L87 Difference]: Start difference. First operand 1190 states and 1596 transitions. Second operand 24 states. [2020-10-26 19:32:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:18,111 INFO L93 Difference]: Finished difference Result 1736 states and 2346 transitions. [2020-10-26 19:32:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:32:18,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-10-26 19:32:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:18,119 INFO L225 Difference]: With dead ends: 1736 [2020-10-26 19:32:18,119 INFO L226 Difference]: Without dead ends: 1589 [2020-10-26 19:32:18,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:32:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-10-26 19:32:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1448. [2020-10-26 19:32:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1448 states. [2020-10-26 19:32:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 1934 transitions. [2020-10-26 19:32:18,392 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 1934 transitions. Word has length 73 [2020-10-26 19:32:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:18,392 INFO L481 AbstractCegarLoop]: Abstraction has 1448 states and 1934 transitions. [2020-10-26 19:32:18,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:32:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 1934 transitions. [2020-10-26 19:32:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:32:18,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:18,396 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:18,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:32:18,396 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1821188116, now seen corresponding path program 2 times [2020-10-26 19:32:18,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:18,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359017252] [2020-10-26 19:32:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:18,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:23,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:32:23,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:24,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:24,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:24,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:24,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:24,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:24,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 16 proven. 124 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-26 19:32:24,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359017252] [2020-10-26 19:32:24,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:24,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:32:24,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829214608] [2020-10-26 19:32:24,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:32:24,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:32:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:32:24,128 INFO L87 Difference]: Start difference. First operand 1448 states and 1934 transitions. Second operand 18 states. [2020-10-26 19:32:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:26,433 INFO L93 Difference]: Finished difference Result 2543 states and 3347 transitions. [2020-10-26 19:32:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:32:26,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-26 19:32:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:26,442 INFO L225 Difference]: With dead ends: 2543 [2020-10-26 19:32:26,442 INFO L226 Difference]: Without dead ends: 2515 [2020-10-26 19:32:26,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=563, Invalid=1693, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:32:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2020-10-26 19:32:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2061. [2020-10-26 19:32:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2020-10-26 19:32:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 2759 transitions. [2020-10-26 19:32:26,858 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 2759 transitions. Word has length 73 [2020-10-26 19:32:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:26,858 INFO L481 AbstractCegarLoop]: Abstraction has 2061 states and 2759 transitions. [2020-10-26 19:32:26,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:32:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 2759 transitions. [2020-10-26 19:32:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:32:26,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:26,864 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:26,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:32:26,865 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1886973166, now seen corresponding path program 3 times [2020-10-26 19:32:26,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:26,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157456423] [2020-10-26 19:32:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:26,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:26,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:31,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:32:31,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:32,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:32,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:32,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:32,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:32,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:32:32,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157456423] [2020-10-26 19:32:32,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:32,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:32:32,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506353676] [2020-10-26 19:32:32,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:32:32,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:32,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:32:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:32:32,047 INFO L87 Difference]: Start difference. First operand 2061 states and 2759 transitions. Second operand 13 states. [2020-10-26 19:32:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:32,597 INFO L93 Difference]: Finished difference Result 4091 states and 5470 transitions. [2020-10-26 19:32:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:32:32,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 73 [2020-10-26 19:32:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:32,609 INFO L225 Difference]: With dead ends: 4091 [2020-10-26 19:32:32,609 INFO L226 Difference]: Without dead ends: 2991 [2020-10-26 19:32:32,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:32:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2020-10-26 19:32:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2088. [2020-10-26 19:32:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-10-26 19:32:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2799 transitions. [2020-10-26 19:32:33,021 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2799 transitions. Word has length 73 [2020-10-26 19:32:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:33,021 INFO L481 AbstractCegarLoop]: Abstraction has 2088 states and 2799 transitions. [2020-10-26 19:32:33,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:32:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2799 transitions. [2020-10-26 19:32:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:32:33,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:33,027 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:33,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:32:33,027 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 420039244, now seen corresponding path program 4 times [2020-10-26 19:32:33,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:33,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545071162] [2020-10-26 19:32:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:33,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:38,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:32:38,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:38,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:38,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:38,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:32:38,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545071162] [2020-10-26 19:32:38,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:38,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:32:38,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522854879] [2020-10-26 19:32:38,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:32:38,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:32:38,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:32:38,249 INFO L87 Difference]: Start difference. First operand 2088 states and 2799 transitions. Second operand 14 states. [2020-10-26 19:32:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:38,915 INFO L93 Difference]: Finished difference Result 4312 states and 5793 transitions. [2020-10-26 19:32:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:32:38,916 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-26 19:32:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:38,929 INFO L225 Difference]: With dead ends: 4312 [2020-10-26 19:32:38,929 INFO L226 Difference]: Without dead ends: 3304 [2020-10-26 19:32:38,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:32:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2020-10-26 19:32:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2390. [2020-10-26 19:32:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2390 states. [2020-10-26 19:32:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 3193 transitions. [2020-10-26 19:32:39,326 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 3193 transitions. Word has length 79 [2020-10-26 19:32:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:39,326 INFO L481 AbstractCegarLoop]: Abstraction has 2390 states and 3193 transitions. [2020-10-26 19:32:39,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:32:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 3193 transitions. [2020-10-26 19:32:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:32:39,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:39,333 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:39,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:32:39,333 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1562322670, now seen corresponding path program 5 times [2020-10-26 19:32:39,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:39,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352272559] [2020-10-26 19:32:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:39,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:42,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:44,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:44,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:32:44,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:32:44,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:32:44,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:44,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:32:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:44,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:32:44,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:44,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:44,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:44,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:44,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:32:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 58 proven. 113 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-10-26 19:32:44,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352272559] [2020-10-26 19:32:44,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:44,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:32:44,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783650321] [2020-10-26 19:32:44,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:32:44,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:32:44,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:32:44,813 INFO L87 Difference]: Start difference. First operand 2390 states and 3193 transitions. Second operand 16 states. [2020-10-26 19:32:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:46,552 INFO L93 Difference]: Finished difference Result 3545 states and 4657 transitions. [2020-10-26 19:32:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:32:46,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-10-26 19:32:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:46,586 INFO L225 Difference]: With dead ends: 3545 [2020-10-26 19:32:46,586 INFO L226 Difference]: Without dead ends: 3517 [2020-10-26 19:32:46,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2020-10-26 19:32:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 1376. [2020-10-26 19:32:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2020-10-26 19:32:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1837 transitions. [2020-10-26 19:32:46,778 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1837 transitions. Word has length 85 [2020-10-26 19:32:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:46,779 INFO L481 AbstractCegarLoop]: Abstraction has 1376 states and 1837 transitions. [2020-10-26 19:32:46,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:32:46,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1837 transitions. [2020-10-26 19:32:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:32:46,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:46,783 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:46,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:32:46,783 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash -45551698, now seen corresponding path program 6 times [2020-10-26 19:32:46,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:46,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56755277] [2020-10-26 19:32:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:46,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:47,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:32:51,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:51,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:32:51,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:32:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:51,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:32:51,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:51,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-26 19:32:52,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56755277] [2020-10-26 19:32:52,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:52,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:32:52,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807989948] [2020-10-26 19:32:52,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:32:52,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:52,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:32:52,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:32:52,003 INFO L87 Difference]: Start difference. First operand 1376 states and 1837 transitions. Second operand 15 states. [2020-10-26 19:32:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:52,540 INFO L93 Difference]: Finished difference Result 2785 states and 3746 transitions. [2020-10-26 19:32:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:32:52,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 85 [2020-10-26 19:32:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:52,548 INFO L225 Difference]: With dead ends: 2785 [2020-10-26 19:32:52,548 INFO L226 Difference]: Without dead ends: 1976 [2020-10-26 19:32:52,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:32:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-10-26 19:32:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1517. [2020-10-26 19:32:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1517 states. [2020-10-26 19:32:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2025 transitions. [2020-10-26 19:32:52,829 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2025 transitions. Word has length 85 [2020-10-26 19:32:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:52,829 INFO L481 AbstractCegarLoop]: Abstraction has 1517 states and 2025 transitions. [2020-10-26 19:32:52,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:32:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2025 transitions. [2020-10-26 19:32:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:32:52,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:52,833 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:52,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:32:52,833 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1033832782, now seen corresponding path program 7 times [2020-10-26 19:32:52,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:52,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707513827] [2020-10-26 19:32:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:56,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:56,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:32:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:59,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:59,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 97 proven. 308 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:32:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707513827] [2020-10-26 19:32:59,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:59,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:32:59,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422646316] [2020-10-26 19:32:59,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:32:59,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:59,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:32:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:32:59,444 INFO L87 Difference]: Start difference. First operand 1517 states and 2025 transitions. Second operand 33 states. [2020-10-26 19:33:00,699 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-26 19:33:00,885 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42