/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:11:10,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:11:10,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:11:10,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:11:10,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:11:10,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:11:10,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:11:10,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:11:10,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:11:10,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:11:10,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:11:10,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:11:10,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:11:10,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:11:10,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:11:10,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:11:10,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:11:10,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:11:10,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:11:10,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:11:10,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:11:10,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:11:10,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:11:10,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:11:10,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:11:10,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:11:10,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:11:10,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:11:10,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:11:10,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:11:10,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:11:10,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:11:10,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:11:10,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:11:10,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:11:10,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:11:10,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:11:10,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:11:10,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:11:10,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:11:10,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:11:10,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:11:10,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:11:10,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:11:10,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:11:10,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:11:10,551 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:11:10,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:11:10,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:11:10,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:11:10,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:11:10,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:11:10,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:11:10,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:11:10,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:11:10,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:11:10,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:11:10,555 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:11:10,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:11:10,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:11:10,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:11:10,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:11:10,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:11:10,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:11:10,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:11:10,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:11:10,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:11:10,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:11:10,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:11:10,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:11:10,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:11:10,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:11:11,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:11:11,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:11:11,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:11:11,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:11:11,114 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:11:11,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-28 15:11:11,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1728ddcf/36a11d137b8848e69f6a7700e87c8bb2/FLAGd06b19954 [2020-10-28 15:11:11,921 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:11:11,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-28 15:11:11,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1728ddcf/36a11d137b8848e69f6a7700e87c8bb2/FLAGd06b19954 [2020-10-28 15:11:12,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c1728ddcf/36a11d137b8848e69f6a7700e87c8bb2 [2020-10-28 15:11:12,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:11:12,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:11:12,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:11:12,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:11:12,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:11:12,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae908ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12, skipping insertion in model container [2020-10-28 15:11:12,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:11:12,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:11:12,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:11:12,535 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:11:12,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:11:12,569 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:11:12,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12 WrapperNode [2020-10-28 15:11:12,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:11:12,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:11:12,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:11:12,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:11:12,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... [2020-10-28 15:11:12,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:11:12,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:11:12,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:11:12,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:11:12,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:11:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:11:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:11:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:11:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:11:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:11:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:11:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:11:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:11:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:11:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:11:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:11:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:11:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:11:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:11:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:11:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:11:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:11:12,934 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:11:12,935 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:11:12,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:11:12 BoogieIcfgContainer [2020-10-28 15:11:12,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:11:12,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:11:12,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:11:12,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:11:12,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:11:12" (1/3) ... [2020-10-28 15:11:12,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c430bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:11:12, skipping insertion in model container [2020-10-28 15:11:12,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:11:12" (2/3) ... [2020-10-28 15:11:12,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c430bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:11:12, skipping insertion in model container [2020-10-28 15:11:12,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:11:12" (3/3) ... [2020-10-28 15:11:12,965 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2020-10-28 15:11:12,992 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:11:13,006 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:11:13,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:11:13,064 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:11:13,064 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:11:13,064 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:11:13,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:11:13,064 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:11:13,065 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:11:13,065 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:11:13,065 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:11:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 15:11:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:11:13,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:13,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:13,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-28 15:11:13,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:13,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57623319] [2020-10-28 15:11:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:13,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:13,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:11:13,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:13,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 15:11:13,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:13,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:11:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:13,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:11:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:13,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:13,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:13,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:13,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:13,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 15:11:13,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:13,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:13,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:13,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:13,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:13,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57623319] [2020-10-28 15:11:13,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:11:13,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:11:13,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129270113] [2020-10-28 15:11:13,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:11:13,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:11:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:11:13,596 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 15:11:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:13,694 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 15:11:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:11:13,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:11:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:13,704 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:11:13,704 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:11:13,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:11:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:11:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:11:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:11:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 15:11:13,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 15:11:13,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:13,750 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 15:11:13,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:11:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 15:11:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:11:13,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:13,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:13,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:11:13,752 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1192214991, now seen corresponding path program 1 times [2020-10-28 15:11:13,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:13,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859129932] [2020-10-28 15:11:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:13,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:13,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:11:13,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:13,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 15:11:13,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:13,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:11:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:11:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:14,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:14,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:14,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:11:14,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:14,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:14,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:14,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859129932] [2020-10-28 15:11:14,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:11:14,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:11:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985801113] [2020-10-28 15:11:14,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:11:14,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:14,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:11:14,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:11:14,080 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-28 15:11:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:14,203 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-28 15:11:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:11:14,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 15:11:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:14,205 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:11:14,205 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:11:14,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:11:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:11:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-28 15:11:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:11:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-28 15:11:14,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-28 15:11:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:14,215 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-28 15:11:14,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:11:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-28 15:11:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:11:14,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:14,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:14,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:11:14,217 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-10-28 15:11:14,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:14,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463815486] [2020-10-28 15:11:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:11:14,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:11:14,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-28 15:11:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:11:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:11:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:11:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:14,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:14,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:14,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:14,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:11:14,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:14,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:14,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:14,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:14,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:14,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:14,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463815486] [2020-10-28 15:11:14,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:14,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:11:14,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897511919] [2020-10-28 15:11:14,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:11:14,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:14,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:11:14,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:11:14,722 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-28 15:11:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:14,891 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-28 15:11:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:11:14,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-28 15:11:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:14,893 INFO L225 Difference]: With dead ends: 27 [2020-10-28 15:11:14,893 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:11:14,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:11:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-28 15:11:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:11:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-28 15:11:14,902 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-28 15:11:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:14,902 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-28 15:11:14,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:11:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-28 15:11:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:11:14,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:14,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:14,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:11:14,904 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -144391185, now seen corresponding path program 2 times [2020-10-28 15:11:14,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:14,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215134093] [2020-10-28 15:11:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:14,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:14,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:15,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:11:15,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:15,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-28 15:11:15,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:15,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:11:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:11:15,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:15,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:15,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:15,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:15,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:11:15,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:15,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:15,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:15,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:15,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:15,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215134093] [2020-10-28 15:11:15,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:15,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:11:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935946797] [2020-10-28 15:11:15,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:11:15,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:11:15,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:11:15,245 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-28 15:11:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:15,363 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-28 15:11:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:11:15,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 15:11:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:15,365 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:11:15,365 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:11:15,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:11:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 15:11:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:11:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 15:11:15,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-28 15:11:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:15,373 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 15:11:15,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:11:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 15:11:15,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:11:15,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:15,374 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:15,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:11:15,374 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:15,375 INFO L82 PathProgramCache]: Analyzing trace with hash -252673233, now seen corresponding path program 1 times [2020-10-28 15:11:15,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:15,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983370082] [2020-10-28 15:11:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:15,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:11:15,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:11:15,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 15:11:15,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:15,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:11:15,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:15,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:11:15,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:15,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:15,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:15,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:15,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:15,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:15,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:15,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:15,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:15,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:15,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:15,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983370082] [2020-10-28 15:11:15,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:15,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:11:15,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889943959] [2020-10-28 15:11:15,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:11:15,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:15,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:11:15,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:11:15,720 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-28 15:11:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:15,907 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-28 15:11:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:11:15,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:11:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:15,909 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:11:15,909 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:11:15,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:15,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:11:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-28 15:11:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:11:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 15:11:15,917 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-28 15:11:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:15,917 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 15:11:15,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:11:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 15:11:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:11:15,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:15,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:15,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:11:15,919 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 1 times [2020-10-28 15:11:15,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:15,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578360033] [2020-10-28 15:11:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:15,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:16,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:11:16,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:11:16,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-28 15:11:16,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:16,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:16,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:11:16,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:16,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:11:16,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:16,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:16,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:16,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:16,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:16,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:16,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:16,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:16,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:16,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:16,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578360033] [2020-10-28 15:11:16,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:16,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:11:16,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787235853] [2020-10-28 15:11:16,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:11:16,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:16,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:11:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:11:16,513 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-10-28 15:11:16,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:16,797 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-28 15:11:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:11:16,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 15:11:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:16,799 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:11:16,799 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:11:16,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:11:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:11:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-28 15:11:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:11:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 15:11:16,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-28 15:11:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:16,807 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 15:11:16,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:11:16,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 15:11:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:11:16,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:16,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:16,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:11:16,809 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash 575077711, now seen corresponding path program 2 times [2020-10-28 15:11:16,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:16,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539515384] [2020-10-28 15:11:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:16,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:16,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:17,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:17,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:17,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:11:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:17,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:11:17,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:17,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:17,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:17,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:17,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:17,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:17,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:17,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:17,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:17,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:17,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:17,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:17,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539515384] [2020-10-28 15:11:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:11:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780254359] [2020-10-28 15:11:17,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:11:17,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:17,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:11:17,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:11:17,643 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-10-28 15:11:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:18,092 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-28 15:11:18,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:11:18,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 15:11:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:18,093 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:11:18,093 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:11:18,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:11:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:11:18,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-28 15:11:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:11:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-28 15:11:18,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-10-28 15:11:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:18,102 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-28 15:11:18,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:11:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-28 15:11:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:11:18,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:18,104 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:18,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:11:18,104 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:18,105 INFO L82 PathProgramCache]: Analyzing trace with hash -335227126, now seen corresponding path program 3 times [2020-10-28 15:11:18,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:18,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62082508] [2020-10-28 15:11:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:18,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:18,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:11:18,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:11:18,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-28 15:11:18,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:18,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:18,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:11:18,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:18,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:11:18,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:19,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:19,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:19,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:19,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:11:19,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:19,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:19,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:11:19,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62082508] [2020-10-28 15:11:19,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:19,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:11:19,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411172598] [2020-10-28 15:11:19,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:11:19,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:11:19,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:11:19,100 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-28 15:11:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:19,421 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-28 15:11:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:11:19,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 15:11:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:19,423 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:11:19,423 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:11:19,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:11:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:11:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 15:11:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:11:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-28 15:11:19,431 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2020-10-28 15:11:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:19,431 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-28 15:11:19,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:11:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-28 15:11:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:11:19,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:19,432 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:19,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:11:19,433 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1454626424, now seen corresponding path program 2 times [2020-10-28 15:11:19,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:19,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760730132] [2020-10-28 15:11:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:19,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:20,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:11:20,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:11:20,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-28 15:11:20,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:20,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:11:20,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:20,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:11:20,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:20,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:20,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:20,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:20,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:11:20,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:20,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:11:20,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760730132] [2020-10-28 15:11:20,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:20,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:11:20,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599128253] [2020-10-28 15:11:20,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:11:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:11:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:11:20,597 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2020-10-28 15:11:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:20,804 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-28 15:11:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:11:20,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-28 15:11:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:20,806 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:11:20,806 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:11:20,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:11:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:11:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-28 15:11:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:11:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-28 15:11:20,815 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-10-28 15:11:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:20,816 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-28 15:11:20,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:11:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-28 15:11:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:11:20,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:20,817 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:20,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:11:20,818 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:20,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1593447473, now seen corresponding path program 4 times [2020-10-28 15:11:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:20,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3179719] [2020-10-28 15:11:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:20,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:20,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:21,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:21,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:23,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:23,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:11:23,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:11:23,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2584 [2020-10-28 15:11:23,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:23,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:11:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:11:23,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:25,849 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2020-10-28 15:11:25,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:25,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:25,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:25,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:25,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:11:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:11:25,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3179719] [2020-10-28 15:11:25,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:25,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:11:25,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133440060] [2020-10-28 15:11:25,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:11:25,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:25,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:11:25,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=53, Unknown=1, NotChecked=0, Total=72 [2020-10-28 15:11:25,922 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-10-28 15:11:26,553 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-28 15:11:26,718 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-28 15:11:26,962 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-28 15:11:27,330 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-28 15:11:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:11:29,766 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-28 15:11:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:11:29,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-28 15:11:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:11:29,769 INFO L225 Difference]: With dead ends: 55 [2020-10-28 15:11:29,769 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:11:29,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=129, Invalid=249, Unknown=2, NotChecked=0, Total=380 [2020-10-28 15:11:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:11:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-10-28 15:11:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:11:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-28 15:11:29,781 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2020-10-28 15:11:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:11:29,781 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-28 15:11:29,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:11:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-28 15:11:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 15:11:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:11:29,783 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:11:29,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:11:29,783 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:11:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:11:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1178515384, now seen corresponding path program 5 times [2020-10-28 15:11:29,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:11:29,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628753631] [2020-10-28 15:11:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:11:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:29,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:29,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:30,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:34,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:34,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 15:11:34,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:11:34,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:11:34,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:34,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:11:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:11:34,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:11:34,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:11:35,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:11:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:11:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:11:35,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:11:35,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:11:35,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:11:35,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:11:35,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:11:35,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:11:35,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:11:35,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:11:35,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:11:35,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:11:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 15:11:35,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628753631] [2020-10-28 15:11:35,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:11:35,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:11:35,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643480202] [2020-10-28 15:11:35,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:11:35,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:11:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:11:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:11:35,388 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 12 states. [2020-10-28 15:11:39,371 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-28 15:11:39,596 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-28 15:11:40,374 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-28 15:11:40,693 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-28 15:11:41,022 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-28 15:11:41,266 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-28 15:11:49,832 WARN L193 SmtUtils]: Spent 8.20 s on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-28 15:11:51,861 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-28 15:11:54,498 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-28 15:11:58,014 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-28 15:12:07,759 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-28 15:12:07,985 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-28 15:12:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:12,676 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2020-10-28 15:12:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:12:12,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 15:12:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:12,678 INFO L225 Difference]: With dead ends: 99 [2020-10-28 15:12:12,679 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 15:12:12,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=275, Invalid=719, Unknown=2, NotChecked=60, Total=1056 [2020-10-28 15:12:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 15:12:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2020-10-28 15:12:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:12:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-28 15:12:12,701 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 39 [2020-10-28 15:12:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:12,702 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-28 15:12:12,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:12:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-28 15:12:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 15:12:12,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:12,709 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:12,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:12:12,710 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1697369000, now seen corresponding path program 6 times [2020-10-28 15:12:12,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:12,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578145759] [2020-10-28 15:12:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:12,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:12,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:17,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 15:12:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:12:17,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 15:12:17,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:17,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:12:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:17,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:12:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:36,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:12:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:36,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:36,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:36,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:12:36,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:12:36,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:12:36,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:36,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:12:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:12:36,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:12:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:12:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 129 refuted. 21 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:12:36,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578145759] [2020-10-28 15:12:36,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:12:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:12:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973759803] [2020-10-28 15:12:36,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:12:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:12:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:12:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=96, Unknown=9, NotChecked=0, Total=132 [2020-10-28 15:12:36,934 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 12 states. [2020-10-28 15:12:37,589 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 15:12:37,764 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 15:12:38,110 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 15:12:38,395 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 15:12:38,674 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-28 15:12:38,998 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 15:12:40,176 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2020-10-28 15:12:40,493 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2020-10-28 15:12:42,560 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-28 15:12:43,490 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 56 [2020-10-28 15:12:43,851 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-28 15:12:44,188 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-28 15:12:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:12:45,601 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-10-28 15:12:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:12:45,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-28 15:12:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:12:45,603 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:12:45,603 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 15:12:45,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=304, Invalid=679, Unknown=9, NotChecked=0, Total=992 [2020-10-28 15:12:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 15:12:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2020-10-28 15:12:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:12:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-28 15:12:45,618 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 45 [2020-10-28 15:12:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:12:45,618 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-28 15:12:45,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:12:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-28 15:12:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:12:45,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:12:45,619 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:12:45,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:12:45,620 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:12:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:12:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1819131409, now seen corresponding path program 7 times [2020-10-28 15:12:45,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:12:45,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941358676] [2020-10-28 15:12:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:12:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:12:45,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:45,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:45,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:45,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:46,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:47,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:12:50,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:12:50,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:12:50,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:12:50,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 15:12:50,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:12:50,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:12:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:12:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:12:50,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 15:12:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:20,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:20,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:20,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:20,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:13:20,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:20,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 166 refuted. 18 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-28 15:13:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941358676] [2020-10-28 15:13:20,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:20,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:13:20,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590096091] [2020-10-28 15:13:20,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:13:20,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:13:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=111, Unknown=14, NotChecked=0, Total=156 [2020-10-28 15:13:20,332 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 13 states. [2020-10-28 15:13:21,025 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 15:13:21,252 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-28 15:13:21,557 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-28 15:13:21,866 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-28 15:13:22,193 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-28 15:13:22,489 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-28 15:13:22,915 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 60 [2020-10-28 15:13:23,225 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-28 15:13:23,706 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2020-10-28 15:13:26,506 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-28 15:13:26,919 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2020-10-28 15:13:27,749 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2020-10-28 15:13:28,095 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-28 15:13:28,523 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2020-10-28 15:13:29,055 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-28 15:13:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:39,597 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2020-10-28 15:13:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:13:39,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-10-28 15:13:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:39,605 INFO L225 Difference]: With dead ends: 79 [2020-10-28 15:13:39,605 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:13:39,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=377, Invalid=869, Unknown=14, NotChecked=0, Total=1260 [2020-10-28 15:13:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:13:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-10-28 15:13:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:13:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-28 15:13:39,637 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 48 [2020-10-28 15:13:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:39,638 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-28 15:13:39,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:13:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-28 15:13:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 15:13:39,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:39,642 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:39,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:13:39,642 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash -4307192, now seen corresponding path program 8 times [2020-10-28 15:13:39,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:39,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92093970] [2020-10-28 15:13:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:39,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:40,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:42,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:42,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:43,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:44,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:44,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 15:13:44,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 15:13:44,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:13:44,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:44,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:44,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:13:44,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:44,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:13:44,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:44,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:13:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:44,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:44,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:44,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:13:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:13:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:13:44,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92093970] [2020-10-28 15:13:44,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:13:44,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:13:44,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576434810] [2020-10-28 15:13:44,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:13:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:13:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:13:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:13:44,941 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 13 states. [2020-10-28 15:13:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:13:45,805 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-10-28 15:13:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:13:45,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-28 15:13:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:13:45,807 INFO L225 Difference]: With dead ends: 100 [2020-10-28 15:13:45,807 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 15:13:45,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:13:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 15:13:45,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-28 15:13:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:13:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-28 15:13:45,829 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 51 [2020-10-28 15:13:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:13:45,830 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-28 15:13:45,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:13:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-28 15:13:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:13:45,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:13:45,831 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:13:45,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:13:45,831 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:13:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:13:45,832 INFO L82 PathProgramCache]: Analyzing trace with hash -762375889, now seen corresponding path program 9 times [2020-10-28 15:13:45,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:13:45,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136827242] [2020-10-28 15:13:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:13:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:13:45,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:45,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:47,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:48,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:48,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:48,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:50,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:13:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:13:50,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 15:13:50,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:49,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:49,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:49,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:49,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:14:49,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:49,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:49,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:49,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:49,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:49,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:14:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 364 refuted. 36 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 15:14:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136827242] [2020-10-28 15:14:49,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:14:49,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:14:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685957431] [2020-10-28 15:14:49,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:14:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:14:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=172, Unknown=28, NotChecked=0, Total=240 [2020-10-28 15:14:49,372 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 16 states. [2020-10-28 15:14:52,296 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-28 15:14:52,567 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-28 15:14:55,014 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-28 15:14:55,325 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-28 15:14:55,772 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-28 15:14:56,194 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-28 15:14:56,795 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-28 15:14:58,923 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-28 15:14:59,582 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2020-10-28 15:15:00,116 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 60 [2020-10-28 15:15:03,336 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 121 DAG size of output: 56 [2020-10-28 15:15:03,754 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 60 [2020-10-28 15:15:06,595 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 132 DAG size of output: 56 [2020-10-28 15:15:07,380 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 60 [2020-10-28 15:15:07,943 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 56 [2020-10-28 15:15:08,783 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 60 [2020-10-28 15:15:09,797 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 56 [2020-10-28 15:15:12,534 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 138 DAG size of output: 61 [2020-10-28 15:15:15,183 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 61 [2020-10-28 15:15:18,657 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 61 [2020-10-28 15:15:20,517 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2020-10-28 15:15:21,856 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-28 15:15:24,230 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61