/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:41:50,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:41:50,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:41:50,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:41:50,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:41:50,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:41:50,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:41:50,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:41:50,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:41:50,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:41:50,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:41:50,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:41:50,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:41:50,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:41:50,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:41:50,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:41:50,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:41:50,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:41:50,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:41:50,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:41:50,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:41:50,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:41:50,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:41:50,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:41:50,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:41:50,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:41:50,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:41:50,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:41:50,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:41:50,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:41:50,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:41:50,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:41:50,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:41:50,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:41:50,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:41:50,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:41:50,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:41:50,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:41:50,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:41:50,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:41:50,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:41:50,598 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 [2020-10-27 01:41:50,658 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:41:50,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:41:50,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:41:50,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:41:50,664 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:41:50,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:41:50,665 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:41:50,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:41:50,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:41:50,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:41:50,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:41:50,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:41:50,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:41:50,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:41:50,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:41:50,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:41:50,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:41:50,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:41:50,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:41:50,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:41:50,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:41:50,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:41:50,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:41:50,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:41:50,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:41:50,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:41:50,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:41:50,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:41:50,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:41:50,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:41:51,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:41:51,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:41:51,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:41:51,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:41:51,070 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:41:51,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2020-10-27 01:41:51,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49c153ee/22a49c37d1d14777a583c1ff38a943f8/FLAG3a95291fd [2020-10-27 01:41:51,747 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:41:51,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gr2006.i [2020-10-27 01:41:51,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49c153ee/22a49c37d1d14777a583c1ff38a943f8/FLAG3a95291fd [2020-10-27 01:41:52,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d49c153ee/22a49c37d1d14777a583c1ff38a943f8 [2020-10-27 01:41:52,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:41:52,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:41:52,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:41:52,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:41:52,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:41:52,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e918245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52, skipping insertion in model container [2020-10-27 01:41:52,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:41:52,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:41:52,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:41:52,390 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:41:52,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:41:52,426 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:41:52,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52 WrapperNode [2020-10-27 01:41:52,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:41:52,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:41:52,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:41:52,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:41:52,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (1/1) ... [2020-10-27 01:41:52,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:41:52,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:41:52,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:41:52,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:41:52,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (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 [2020-10-27 01:41:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:41:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:41:52,557 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:41:52,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:41:52,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:41:52,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:41:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:41:52,558 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:41:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:41:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:41:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:41:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:41:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:41:52,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:41:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:41:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:41:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:41:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:41:52,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:41:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:41:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:41:52,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:41:52,835 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:41:52,836 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:41:52,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:41:52 BoogieIcfgContainer [2020-10-27 01:41:52,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:41:52,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:41:52,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:41:52,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:41:52,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:41:52" (1/3) ... [2020-10-27 01:41:52,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c6b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:41:52, skipping insertion in model container [2020-10-27 01:41:52,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:41:52" (2/3) ... [2020-10-27 01:41:52,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c6b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:41:52, skipping insertion in model container [2020-10-27 01:41:52,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:41:52" (3/3) ... [2020-10-27 01:41:52,866 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2020-10-27 01:41:52,879 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:41:52,884 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:41:52,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:41:52,929 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:41:52,929 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:41:52,929 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:41:52,929 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:41:52,930 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:41:52,930 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:41:52,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:41:52,930 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:41:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:41:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:41:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:52,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:52,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1313296839, now seen corresponding path program 1 times [2020-10-27 01:41:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:52,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019903864] [2020-10-27 01:41:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:53,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:53,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:53,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:41:53,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-27 01:41:53,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:41:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:41:53,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:53,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:53,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:53,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:53,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:53,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:41:53,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:53,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:53,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:53,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019903864] [2020-10-27 01:41:53,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:53,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:41:53,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204018063] [2020-10-27 01:41:53,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:41:53,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:41:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:41:53,446 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-27 01:41:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:53,506 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-27 01:41:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:41:53,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 01:41:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:53,516 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:41:53,516 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:41:53,520 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 [2020-10-27 01:41:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:41:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:41:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:41:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:41:53,560 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-27 01:41:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:53,560 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:41:53,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:41:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:41:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:41:53,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:53,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:53,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:41:53,562 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash 851353874, now seen corresponding path program 1 times [2020-10-27 01:41:53,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:53,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306902469] [2020-10-27 01:41:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:53,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:53,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:41:53,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:53,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 01:41:53,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:41:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:41:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:53,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:53,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:53,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:53,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:53,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:41:53,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:53,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:53,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:53,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:53,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306902469] [2020-10-27 01:41:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:53,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:41:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128642283] [2020-10-27 01:41:53,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:41:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:41:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:53,826 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-27 01:41:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:54,040 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:41:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:41:54,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:41:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:54,042 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:41:54,042 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:41:54,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:41:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:41:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:41:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:41:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 01:41:54,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 01:41:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:54,063 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 01:41:54,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:41:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 01:41:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:41:54,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:54,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:54,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:41:54,069 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash 42007248, now seen corresponding path program 1 times [2020-10-27 01:41:54,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:54,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911335961] [2020-10-27 01:41:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:41:54,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:54,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-27 01:41:54,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:41:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:41:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:54,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:54,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:54,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:41:54,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:54,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:54,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:54,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911335961] [2020-10-27 01:41:54,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:41:54,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:41:54,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840411467] [2020-10-27 01:41:54,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:41:54,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:41:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:41:54,277 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-27 01:41:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:54,371 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-27 01:41:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:41:54,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:41:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:54,373 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:41:54,373 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:41:54,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:41:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 01:41:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:41:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 01:41:54,388 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-27 01:41:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:54,388 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 01:41:54,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:41:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 01:41:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:41:54,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:54,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:54,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:41:54,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:54,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1527438062, now seen corresponding path program 1 times [2020-10-27 01:41:54,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:54,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464005022] [2020-10-27 01:41:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:41:54,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:41:54,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 01:41:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:41:54,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:54,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:41:54,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:41:54,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:54,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:54,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:54,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:41:54,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:54,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:54,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:54,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:54,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:41:54,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464005022] [2020-10-27 01:41:54,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:54,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:41:54,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574925209] [2020-10-27 01:41:54,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:41:54,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:54,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:41:54,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:41:54,629 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-27 01:41:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:54,734 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-27 01:41:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:41:54,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 01:41:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:54,736 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:41:54,736 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 01:41:54,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:41:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 01:41:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 01:41:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:41:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 01:41:54,744 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-27 01:41:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:54,744 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 01:41:54,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:41:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 01:41:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:41:54,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:54,745 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:54,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:41:54,746 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash -424032460, now seen corresponding path program 2 times [2020-10-27 01:41:54,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:54,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940075533] [2020-10-27 01:41:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:54,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:55,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:41:55,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:41:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-27 01:41:55,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:41:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:55,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:41:55,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:55,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:55,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:55,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:55,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:41:55,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:55,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:55,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 01:41:55,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940075533] [2020-10-27 01:41:55,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:55,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:41:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145254409] [2020-10-27 01:41:55,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:41:55,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:55,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:41:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:41:55,252 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 01:41:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:55,422 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-27 01:41:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:41:55,422 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:41:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:55,426 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:41:55,426 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:41:55,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:41:55,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:41:55,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-27 01:41:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:41:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-27 01:41:55,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-10-27 01:41:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:55,437 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-27 01:41:55,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:41:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-27 01:41:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:41:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:55,439 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:55,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:41:55,440 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash 736423184, now seen corresponding path program 3 times [2020-10-27 01:41:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:55,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141830925] [2020-10-27 01:41:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:55,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:41:55,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:41:55,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 01:41:55,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:55,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:41:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:41:55,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:55,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:55,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:55,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:55,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:55,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:55,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:41:55,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:55,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:55,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:55,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141830925] [2020-10-27 01:41:55,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:55,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:41:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108936709] [2020-10-27 01:41:55,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:41:55,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:41:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:41:55,782 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-27 01:41:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:56,000 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-27 01:41:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:41:56,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 01:41:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:56,002 INFO L225 Difference]: With dead ends: 55 [2020-10-27 01:41:56,002 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:41:56,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:41:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:41:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 01:41:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:41:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-27 01:41:56,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-10-27 01:41:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:56,012 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-27 01:41:56,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:41:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-27 01:41:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:41:56,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:56,014 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:56,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:41:56,014 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:56,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2081886450, now seen corresponding path program 4 times [2020-10-27 01:41:56,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:56,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098095677] [2020-10-27 01:41:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:56,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:57,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:41:57,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:41:57,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1420 [2020-10-27 01:41:57,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:41:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:41:57,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:41:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:57,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:41:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:57,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:57,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:41:57,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:41:57,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:41:57,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:41:57,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:41:57,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:41:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:41:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:41:57,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:41:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:41:57,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098095677] [2020-10-27 01:41:57,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:41:57,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:41:57,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044900634] [2020-10-27 01:41:57,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:41:57,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:41:57,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:41:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:41:57,598 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 11 states. [2020-10-27 01:41:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:41:58,003 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-27 01:41:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:41:58,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 01:41:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:41:58,005 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:41:58,005 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:41:58,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:41:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:41:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:41:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:41:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-27 01:41:58,024 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 36 [2020-10-27 01:41:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:41:58,025 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-27 01:41:58,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:41:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-27 01:41:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:41:58,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:41:58,029 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:41:58,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:41:58,030 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:41:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:41:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash -143512752, now seen corresponding path program 5 times [2020-10-27 01:41:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:41:58,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351440314] [2020-10-27 01:41:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:41:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:41:58,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:58,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:58,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:41:59,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:00,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:02,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:02,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:42:02,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:42:02,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4494 [2020-10-27 01:42:02,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:02,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:42:02,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:02,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:42:02,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:02,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:02,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:02,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:02,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:42:02,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:42:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 141 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:42:02,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351440314] [2020-10-27 01:42:02,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:02,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:42:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937009343] [2020-10-27 01:42:02,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:42:02,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:02,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:42:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:42:02,699 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2020-10-27 01:42:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:03,175 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2020-10-27 01:42:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:42:03,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 01:42:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:03,179 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:42:03,179 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:42:03,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:42:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:42:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2020-10-27 01:42:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:42:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-27 01:42:03,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 45 [2020-10-27 01:42:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:03,204 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-27 01:42:03,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:42:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-27 01:42:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:42:03,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:03,206 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:03,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:42:03,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash -206445616, now seen corresponding path program 6 times [2020-10-27 01:42:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:03,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184247916] [2020-10-27 01:42:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:03,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:03,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:04,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:06,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:06,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:42:06,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:42:06,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3647 [2020-10-27 01:42:06,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:06,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:42:06,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:06,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:42:06,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:07,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:07,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:07,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:07,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:07,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 202 proven. 155 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 01:42:07,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184247916] [2020-10-27 01:42:07,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:07,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:42:07,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829524830] [2020-10-27 01:42:07,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:42:07,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:07,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:42:07,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:42:07,059 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 14 states. [2020-10-27 01:42:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:07,505 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2020-10-27 01:42:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:42:07,506 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-27 01:42:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:07,507 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:42:07,507 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:42:07,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:42:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:42:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 01:42:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:42:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-27 01:42:07,519 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 63 [2020-10-27 01:42:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:07,519 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-27 01:42:07,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:42:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-27 01:42:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:42:07,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:07,521 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:07,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:42:07,521 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash -554221902, now seen corresponding path program 7 times [2020-10-27 01:42:07,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:07,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706937735] [2020-10-27 01:42:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:07,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:08,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:09,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:09,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:12,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:12,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:42:12,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:42:12,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:42:12,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:42:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:12,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 01:42:12,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:13,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:13,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:13,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:13,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:13,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:13,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:42:13,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:13,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 19 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:13,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706937735] [2020-10-27 01:42:13,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:13,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:42:13,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66172747] [2020-10-27 01:42:13,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:42:13,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:42:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:42:13,023 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 23 states. [2020-10-27 01:42:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:14,112 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-10-27 01:42:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:42:14,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-27 01:42:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:14,114 INFO L225 Difference]: With dead ends: 136 [2020-10-27 01:42:14,116 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:42:14,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:42:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:42:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-27 01:42:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 01:42:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2020-10-27 01:42:14,143 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 72 [2020-10-27 01:42:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2020-10-27 01:42:14,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:42:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2020-10-27 01:42:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 01:42:14,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:14,147 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:14,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:42:14,148 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1921707952, now seen corresponding path program 8 times [2020-10-27 01:42:14,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:14,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626216183] [2020-10-27 01:42:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:14,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:15,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:16,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:19,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:19,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:42:19,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:42:19,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:42:19,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:19,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:42:19,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:19,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:42:19,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:19,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:19,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:19,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:19,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 516 proven. 610 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 01:42:19,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626216183] [2020-10-27 01:42:19,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:19,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:42:19,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916225173] [2020-10-27 01:42:19,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:42:19,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:19,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:42:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:42:19,657 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 24 states. [2020-10-27 01:42:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:20,808 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-27 01:42:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:42:20,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-10-27 01:42:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:20,810 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:42:20,810 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:42:20,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:42:20,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:42:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-27 01:42:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:42:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-10-27 01:42:20,824 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 99 [2020-10-27 01:42:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:20,825 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-10-27 01:42:20,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:42:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-10-27 01:42:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:42:20,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:20,830 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:20,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:42:20,831 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:20,832 INFO L82 PathProgramCache]: Analyzing trace with hash 450117362, now seen corresponding path program 9 times [2020-10-27 01:42:20,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:20,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441126133] [2020-10-27 01:42:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:20,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:21,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:22,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:22,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:25,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:25,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:42:25,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:42:25,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:42:25,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:42:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:25,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:42:25,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:26,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:26,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:26,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:26,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:26,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:26,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:26,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:26,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:26,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:26,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 333 proven. 950 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 01:42:26,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441126133] [2020-10-27 01:42:26,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:26,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:42:26,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775956021] [2020-10-27 01:42:26,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:42:26,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:42:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:42:26,513 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 29 states. [2020-10-27 01:42:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:28,075 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2020-10-27 01:42:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:42:28,075 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 102 [2020-10-27 01:42:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:28,078 INFO L225 Difference]: With dead ends: 154 [2020-10-27 01:42:28,078 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:42:28,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:42:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:42:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:42:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:42:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2020-10-27 01:42:28,096 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 102 [2020-10-27 01:42:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:28,096 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2020-10-27 01:42:28,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:42:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2020-10-27 01:42:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:42:28,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:28,098 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 26, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:28,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:42:28,099 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash 955125392, now seen corresponding path program 10 times [2020-10-27 01:42:28,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:28,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663414048] [2020-10-27 01:42:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:28,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:28,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:29,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:29,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:33,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 01:42:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-27 01:42:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 01:42:33,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:42:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:33,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:42:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:33,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:33,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:33,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:33,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:33,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:42:33,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:33,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:33,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:33,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:33,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 544 proven. 1190 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 01:42:33,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663414048] [2020-10-27 01:42:33,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:33,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:42:33,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004720086] [2020-10-27 01:42:33,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:42:33,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:33,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:42:33,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:42:33,922 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 32 states. [2020-10-27 01:42:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:35,666 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2020-10-27 01:42:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:42:35,666 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 117 [2020-10-27 01:42:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:35,668 INFO L225 Difference]: With dead ends: 163 [2020-10-27 01:42:35,668 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 01:42:35,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:42:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 01:42:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-27 01:42:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:42:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2020-10-27 01:42:35,684 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 117 [2020-10-27 01:42:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:35,684 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2020-10-27 01:42:35,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:42:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2020-10-27 01:42:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 01:42:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:35,686 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 29, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:35,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:42:35,686 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash 14625778, now seen corresponding path program 11 times [2020-10-27 01:42:35,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:35,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608424744] [2020-10-27 01:42:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:39,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:40,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:40,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 01:42:40,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 01:42:40,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:42:40,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:42:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:40,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 01:42:40,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:41,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:41,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:41,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:41,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:41,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:41,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 601 proven. 1457 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 01:42:41,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608424744] [2020-10-27 01:42:41,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:41,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:42:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609901655] [2020-10-27 01:42:41,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:42:41,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:41,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:42:41,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:42:41,521 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand 35 states. [2020-10-27 01:42:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:43,625 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2020-10-27 01:42:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:42:43,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 126 [2020-10-27 01:42:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:43,627 INFO L225 Difference]: With dead ends: 172 [2020-10-27 01:42:43,627 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:42:43,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:42:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:42:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-27 01:42:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-27 01:42:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-10-27 01:42:43,649 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 126 [2020-10-27 01:42:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:43,650 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-10-27 01:42:43,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:42:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-10-27 01:42:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 01:42:43,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:43,655 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 32, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:43,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:42:43,655 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1845230800, now seen corresponding path program 12 times [2020-10-27 01:42:43,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:43,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642069169] [2020-10-27 01:42:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:43,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:44,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:44,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:44,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:45,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:47,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:48,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:48,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 01:42:48,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-27 01:42:48,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:42:48,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:42:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 01:42:48,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:49,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:49,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 816 proven. 1552 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 01:42:49,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642069169] [2020-10-27 01:42:49,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:49,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:42:49,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82453220] [2020-10-27 01:42:49,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:42:49,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:49,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:42:49,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:42:49,552 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 36 states. [2020-10-27 01:42:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:42:51,721 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2020-10-27 01:42:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:42:51,721 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2020-10-27 01:42:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:42:51,722 INFO L225 Difference]: With dead ends: 175 [2020-10-27 01:42:51,722 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:42:51,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:42:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:42:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-27 01:42:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:42:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2020-10-27 01:42:51,735 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 135 [2020-10-27 01:42:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:42:51,735 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2020-10-27 01:42:51,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:42:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2020-10-27 01:42:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 01:42:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:42:51,737 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 33, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:42:51,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:42:51,737 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:42:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:42:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1877998990, now seen corresponding path program 13 times [2020-10-27 01:42:51,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:42:51,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108253698] [2020-10-27 01:42:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:42:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:51,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:51,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:52,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:53,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:56,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:56,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 01:42:56,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:42:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:42:56,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:56,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:42:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:42:56,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 01:42:56,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:42:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:42:58,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:42:58,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:42:58,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:42:58,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:42:58,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:42:58,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:42:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:42:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:42:58,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:42:58,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:42:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 41 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:42:58,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108253698] [2020-10-27 01:42:58,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:42:58,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:42:58,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545306269] [2020-10-27 01:42:58,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:42:58,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:42:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:42:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:42:58,101 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand 45 states. [2020-10-27 01:43:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:01,092 INFO L93 Difference]: Finished difference Result 202 states and 229 transitions. [2020-10-27 01:43:01,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:43:01,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 138 [2020-10-27 01:43:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:01,095 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:43:01,095 INFO L226 Difference]: Without dead ends: 167 [2020-10-27 01:43:01,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:43:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-27 01:43:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-27 01:43:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-27 01:43:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 175 transitions. [2020-10-27 01:43:01,112 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 175 transitions. Word has length 138 [2020-10-27 01:43:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:01,112 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 175 transitions. [2020-10-27 01:43:01,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:43:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 175 transitions. [2020-10-27 01:43:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 01:43:01,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:01,115 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 42, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:01,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:43:01,115 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1027607408, now seen corresponding path program 14 times [2020-10-27 01:43:01,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:01,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991001876] [2020-10-27 01:43:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:01,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:02,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:03,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:06,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:06,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 01:43:06,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 01:43:06,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 01:43:06,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:43:06,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:06,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-27 01:43:06,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:43:07,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:07,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 1066 proven. 2667 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 01:43:07,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991001876] [2020-10-27 01:43:07,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:07,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:43:07,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372550318] [2020-10-27 01:43:07,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:43:07,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:07,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:43:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:43:07,563 INFO L87 Difference]: Start difference. First operand 166 states and 175 transitions. Second operand 46 states. [2020-10-27 01:43:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:10,616 INFO L93 Difference]: Finished difference Result 205 states and 224 transitions. [2020-10-27 01:43:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:43:10,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 165 [2020-10-27 01:43:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:10,618 INFO L225 Difference]: With dead ends: 205 [2020-10-27 01:43:10,619 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 01:43:10,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:43:10,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 01:43:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-27 01:43:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 01:43:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2020-10-27 01:43:10,633 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 165 [2020-10-27 01:43:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:10,633 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2020-10-27 01:43:10,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:43:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2020-10-27 01:43:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 01:43:10,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:10,636 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 43, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:10,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:43:10,637 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash -787746126, now seen corresponding path program 15 times [2020-10-27 01:43:10,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:10,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777722521] [2020-10-27 01:43:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:10,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:11,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:11,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:11,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:11,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:15,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:15,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 01:43:15,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 01:43:15,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:43:15,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:15,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:43:15,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:15,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-27 01:43:15,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:17,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:17,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:17,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:17,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 619 proven. 3337 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 01:43:17,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777722521] [2020-10-27 01:43:17,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:17,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:43:17,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874173991] [2020-10-27 01:43:17,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:43:17,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:17,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:43:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:43:17,386 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 51 states. [2020-10-27 01:43:21,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:21,072 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2020-10-27 01:43:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:43:21,072 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 168 [2020-10-27 01:43:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:21,074 INFO L225 Difference]: With dead ends: 220 [2020-10-27 01:43:21,075 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 01:43:21,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 01:43:21,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 01:43:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-27 01:43:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-27 01:43:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2020-10-27 01:43:21,097 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 168 [2020-10-27 01:43:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:21,097 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2020-10-27 01:43:21,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:43:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2020-10-27 01:43:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 01:43:21,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:21,100 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 48, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:21,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:43:21,101 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:21,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1721736496, now seen corresponding path program 16 times [2020-10-27 01:43:21,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:21,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740921382] [2020-10-27 01:43:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:21,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:22,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:23,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:24,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:25,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:43:26,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:26,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 01:43:26,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:28,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:28,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:28,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:28,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:28,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:28,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:28,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:28,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:28,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 1092 proven. 3626 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 01:43:28,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740921382] [2020-10-27 01:43:28,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:28,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:43:28,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063878438] [2020-10-27 01:43:28,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:43:28,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:43:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:43:28,052 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand 53 states. [2020-10-27 01:43:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:32,141 INFO L93 Difference]: Finished difference Result 232 states and 252 transitions. [2020-10-27 01:43:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:43:32,142 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 183 [2020-10-27 01:43:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:32,145 INFO L225 Difference]: With dead ends: 232 [2020-10-27 01:43:32,145 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 01:43:32,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 01:43:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 01:43:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2020-10-27 01:43:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 01:43:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 199 transitions. [2020-10-27 01:43:32,156 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 199 transitions. Word has length 183 [2020-10-27 01:43:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:32,156 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 199 transitions. [2020-10-27 01:43:32,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:43:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 199 transitions. [2020-10-27 01:43:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-27 01:43:32,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:32,159 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:32,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:43:32,159 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 336291728, now seen corresponding path program 17 times [2020-10-27 01:43:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:32,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899024946] [2020-10-27 01:43:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:32,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:32,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:34,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:37,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:37,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-27 01:43:37,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-27 01:43:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 01:43:37,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 01:43:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-27 01:43:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:39,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:39,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:39,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:39,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:39,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:43:39,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:39,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:39,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:39,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:43:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 4899 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 01:43:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899024946] [2020-10-27 01:43:39,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:39,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:43:39,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987630619] [2020-10-27 01:43:39,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:43:39,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:39,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:43:39,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:43:39,261 INFO L87 Difference]: Start difference. First operand 190 states and 199 transitions. Second operand 54 states. [2020-10-27 01:43:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:43:43,067 INFO L93 Difference]: Finished difference Result 1373 states and 1801 transitions. [2020-10-27 01:43:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:43:43,068 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2020-10-27 01:43:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:43:43,075 INFO L225 Difference]: With dead ends: 1373 [2020-10-27 01:43:43,075 INFO L226 Difference]: Without dead ends: 1366 [2020-10-27 01:43:43,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 01:43:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2020-10-27 01:43:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 316. [2020-10-27 01:43:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-27 01:43:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 367 transitions. [2020-10-27 01:43:43,117 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 367 transitions. Word has length 189 [2020-10-27 01:43:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:43:43,118 INFO L481 AbstractCegarLoop]: Abstraction has 316 states and 367 transitions. [2020-10-27 01:43:43,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:43:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 367 transitions. [2020-10-27 01:43:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 01:43:43,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:43:43,123 INFO L422 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:43:43,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:43:43,123 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:43:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:43:43,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1741954288, now seen corresponding path program 18 times [2020-10-27 01:43:43,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:43:43,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112957030] [2020-10-27 01:43:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:43:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:44,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:48,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 104 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 309 [2020-10-27 01:43:48,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:57,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:43:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:43:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:43:57,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:43:57,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:43:57,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:43:57,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:43:57,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:43:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:43:57,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:43:57,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:43:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:43:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:43:57,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112957030] [2020-10-27 01:43:57,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:43:57,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-10-27 01:43:57,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784466102] [2020-10-27 01:43:57,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-27 01:43:57,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:43:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-27 01:43:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2020-10-27 01:43:57,581 INFO L87 Difference]: Start difference. First operand 316 states and 367 transitions. Second operand 106 states. [2020-10-27 01:44:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:35,605 INFO L93 Difference]: Finished difference Result 634 states and 788 transitions. [2020-10-27 01:44:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-27 01:44:35,608 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 315 [2020-10-27 01:44:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:35,611 INFO L225 Difference]: With dead ends: 634 [2020-10-27 01:44:35,611 INFO L226 Difference]: Without dead ends: 470 [2020-10-27 01:44:35,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=623, Invalid=42849, Unknown=0, NotChecked=0, Total=43472 [2020-10-27 01:44:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-10-27 01:44:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 469. [2020-10-27 01:44:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 01:44:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 520 transitions. [2020-10-27 01:44:35,675 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 520 transitions. Word has length 315 [2020-10-27 01:44:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:35,677 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 520 transitions. [2020-10-27 01:44:35,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-10-27 01:44:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 520 transitions. [2020-10-27 01:44:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-27 01:44:35,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:44:35,680 INFO L422 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:44:35,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:44:35,680 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:44:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:44:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1176702028, now seen corresponding path program 19 times [2020-10-27 01:44:35,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:44:35,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408101595] [2020-10-27 01:44:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:44:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:40,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:40,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-27 01:44:40,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:40,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 01:44:40,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 103 [2020-10-27 01:44:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:44:40,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 304 [2020-10-27 01:44:40,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:44:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:44:42,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:44:42,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:44:42,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:44:42,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:44:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:44:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:44:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:44:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:44:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:44:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:44:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-10-27 01:44:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408101595] [2020-10-27 01:44:43,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:44:43,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:44:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284939462] [2020-10-27 01:44:43,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:44:43,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:44:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:44:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:44:43,049 INFO L87 Difference]: Start difference. First operand 469 states and 520 transitions. Second operand 55 states. [2020-10-27 01:44:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:44:47,852 INFO L93 Difference]: Finished difference Result 470 states and 521 transitions. [2020-10-27 01:44:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:44:47,852 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 318 [2020-10-27 01:44:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:44:47,853 INFO L225 Difference]: With dead ends: 470 [2020-10-27 01:44:47,854 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:44:47,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 01:44:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:44:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:44:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:44:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:44:47,857 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 318 [2020-10-27 01:44:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:44:47,857 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:44:47,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:44:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:44:47,858 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:44:47,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:44:47,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:44:50,591 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 989 DAG size of output: 748 [2020-10-27 01:44:59,421 WARN L193 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 737 DAG size of output: 509 [2020-10-27 01:44:59,429 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-27 01:44:59,429 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-27 01:44:59,429 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-27 01:44:59,430 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-27 01:44:59,430 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-27 01:44:59,430 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:44:59,430 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-27 01:44:59,430 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:44:59,430 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:44:59,430 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:44:59,431 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-27 01:44:59,431 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 39) the Hoare annotation is: true [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-10-27 01:44:59,431 INFO L274 CegarLoopResult]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2020-10-27 01:44:59,434 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse10 (<= 26 main_~y~0)) (.cse11 (<= main_~y~0 26)) (.cse34 (<= 1 main_~y~0)) (.cse35 (<= main_~y~0 1)) (.cse4 (<= 23 main_~y~0)) (.cse5 (<= main_~y~0 23)) (.cse2 (<= 11 main_~y~0)) (.cse3 (<= main_~y~0 11)) (.cse16 (<= main_~y~0 44)) (.cse17 (<= 44 main_~y~0)) (.cse22 (<= main_~y~0 19)) (.cse23 (<= 19 main_~y~0)) (.cse56 (<= 25 main_~y~0)) (.cse57 (<= main_~y~0 25)) (.cse33 (<= main_~y~0 45)) (.cse32 (<= 45 main_~y~0)) (.cse38 (<= main_~y~0 27)) (.cse39 (<= 27 main_~y~0)) (.cse20 (<= 28 main_~y~0)) (.cse21 (<= main_~y~0 28)) (.cse58 (<= main_~y~0 20)) (.cse59 (<= 20 main_~y~0)) (.cse52 (<= 16 main_~y~0)) (.cse53 (<= main_~y~0 16)) (.cse46 (<= main_~y~0 22)) (.cse47 (<= 22 main_~y~0)) (.cse36 (<= 2 main_~y~0)) (.cse37 (<= main_~y~0 2)) (.cse30 (<= 17 main_~y~0)) (.cse31 (<= main_~y~0 17)) (.cse0 (<= main_~y~0 33)) (.cse1 (<= 33 main_~y~0)) (.cse24 (<= main_~y~0 10)) (.cse25 (<= 10 main_~y~0)) (.cse64 (<= 35 main_~y~0)) (.cse65 (<= main_~y~0 35)) (.cse62 (<= main_~y~0 3)) (.cse63 (<= 3 main_~y~0)) (.cse28 (<= 38 main_~y~0)) (.cse29 (<= main_~y~0 38)) (.cse70 (<= 7 main_~y~0)) (.cse71 (<= main_~y~0 7)) (.cse8 (<= main_~y~0 39)) (.cse9 (<= 39 main_~y~0)) (.cse26 (<= main_~y~0 48)) (.cse27 (<= 48 main_~y~0)) (.cse50 (<= 32 main_~y~0)) (.cse51 (<= main_~y~0 32)) (.cse66 (<= 42 main_~y~0)) (.cse67 (<= main_~y~0 42)) (.cse48 (<= main_~y~0 24)) (.cse49 (<= 24 main_~y~0)) (.cse84 (<= 5 main_~y~0)) (.cse85 (<= main_~y~0 5)) (.cse92 (<= 9 main_~y~0)) (.cse93 (<= main_~y~0 9)) (.cse76 (<= main_~y~0 34)) (.cse77 (<= 34 main_~y~0)) (.cse74 (<= main_~y~0 15)) (.cse75 (<= 15 main_~y~0)) (.cse42 (<= main_~y~0 31)) (.cse43 (<= 31 main_~y~0)) (.cse90 (<= 13 main_~y~0)) (.cse91 (<= main_~y~0 13)) (.cse44 (<= main_~y~0 0)) (.cse45 (<= 0 main_~y~0)) (.cse72 (<= 14 main_~y~0)) (.cse73 (<= main_~y~0 14)) (.cse12 (<= 36 main_~y~0)) (.cse13 (<= main_~y~0 36)) (.cse82 (<= main_~y~0 6)) (.cse83 (<= 6 main_~y~0)) (.cse18 (<= 49 main_~y~0)) (.cse19 (<= main_~y~0 49)) (.cse86 (<= 43 main_~y~0)) (.cse87 (<= main_~y~0 43)) (.cse60 (<= 40 main_~y~0)) (.cse61 (<= main_~y~0 40)) (.cse88 (<= 8 main_~y~0)) (.cse89 (<= main_~y~0 8)) (.cse80 (<= 29 main_~y~0)) (.cse81 (<= main_~y~0 29)) (.cse96 (<= 41 main_~y~0)) (.cse97 (<= main_~y~0 41)) (.cse94 (<= main_~y~0 37)) (.cse95 (<= 37 main_~y~0)) (.cse54 (<= main_~y~0 18)) (.cse55 (<= 18 main_~y~0)) (.cse78 (<= main_~y~0 12)) (.cse79 (<= 12 main_~y~0)) (.cse14 (<= main_~y~0 4)) (.cse15 (<= 4 main_~y~0)) (.cse6 (<= main_~y~0 46)) (.cse7 (<= 46 main_~y~0)) (.cse98 (<= 47 main_~y~0)) (.cse99 (<= main_~y~0 47)) (.cse68 (<= main_~y~0 21)) (.cse69 (<= 21 main_~y~0)) (.cse40 (<= 30 main_~y~0)) (.cse41 (<= main_~y~0 30))) (or (and .cse0 .cse1 (<= main_~x~0 67) (<= 67 main_~x~0)) (and .cse2 .cse3 (<= 89 main_~x~0) (<= main_~x~0 89)) (and (<= main_~x~0 23) .cse4 (<= 23 main_~x~0) .cse5) (and .cse6 (<= 54 main_~x~0) .cse7 (<= main_~x~0 54)) (and (<= main_~x~0 61) .cse8 .cse9 (<= 61 main_~x~0)) (and (<= main_~x~0 74) .cse10 (<= 74 main_~x~0) .cse11) (and (<= main_~x~0 36) (<= 36 main_~x~0) .cse12 .cse13) (and .cse14 (<= 4 main_~x~0) .cse15 (<= main_~x~0 4)) (and .cse16 .cse17 (<= 56 main_~x~0) (<= main_~x~0 56)) (and .cse18 (<= main_~x~0 49) .cse19 (<= 49 main_~x~0)) (and .cse20 (<= main_~x~0 28) (<= 28 main_~x~0) .cse21) (and (<= main_~x~0 81) .cse22 .cse23 (<= 81 main_~x~0)) (and .cse24 (<= 10 main_~x~0) (<= main_~x~0 10) .cse25) (and .cse26 .cse27 (<= 48 main_~x~0) (<= main_~x~0 48)) (and (<= 38 main_~x~0) (<= main_~x~0 38) .cse28 .cse29) (and (<= main_~x~0 83) .cse30 (<= 83 main_~x~0) .cse31) (and .cse32 .cse33 (<= 45 main_~x~0) (<= main_~x~0 45)) (and (<= 1 main_~x~0) .cse34 (<= main_~x~0 1) .cse35) (and (<= 98 main_~x~0) .cse36 (<= main_~x~0 98) .cse37) (and (<= 73 main_~x~0) .cse38 (<= main_~x~0 73) .cse39) (and (<= main_~x~0 26) .cse10 (<= 26 main_~x~0) .cse11) (and .cse40 (<= main_~x~0 30) .cse41 (<= 30 main_~x~0)) (and .cse34 (<= main_~x~0 99) (<= 99 main_~x~0) .cse35) (and (<= 31 main_~x~0) .cse42 .cse43 (<= main_~x~0 31)) (and .cse44 (< 99 main_~x~0) .cse45 (<= main_~x~0 100)) (and (<= main_~x~0 22) (<= 22 main_~x~0) .cse46 .cse47) (and (<= 76 main_~x~0) .cse48 .cse49 (<= main_~x~0 76)) (and (<= main_~x~0 77) .cse4 (<= 77 main_~x~0) .cse5) (and (<= 68 main_~x~0) .cse50 .cse51 (<= main_~x~0 68)) (and .cse2 (<= main_~x~0 11) .cse3 (<= 11 main_~x~0)) (and .cse52 .cse53 (<= 16 main_~x~0) (<= main_~x~0 16)) (and (<= 18 main_~x~0) .cse54 .cse55 (<= main_~x~0 18)) (and (<= main_~x~0 50) (<= 50 main_~y~0) (<= 50 main_~x~0) (<= main_~y~0 50)) (and (<= 25 main_~x~0) .cse56 (<= main_~x~0 25) .cse57) (and (<= main_~x~0 44) .cse16 .cse17 (<= 44 main_~x~0)) (and (<= 19 main_~x~0) .cse22 (<= main_~x~0 19) .cse23) (and .cse58 .cse59 (<= 80 main_~x~0) (<= main_~x~0 80)) (and (<= 40 main_~x~0) .cse60 (<= main_~x~0 40) .cse61) (and (<= main_~x~0 97) .cse62 .cse63 (<= 97 main_~x~0)) (and (<= 75 main_~x~0) .cse56 .cse57 (<= main_~x~0 75)) (and .cse64 (<= 65 main_~x~0) .cse65 (<= main_~x~0 65)) (and (<= 55 main_~x~0) .cse33 (<= main_~x~0 55) .cse32) (and (<= main_~x~0 27) .cse38 .cse39 (<= 27 main_~x~0)) (and (<= main_~x~0 72) .cse20 (<= 72 main_~x~0) .cse21) (and (<= main_~x~0 20) .cse58 (<= 20 main_~x~0) .cse59) (and .cse52 .cse53 (<= 84 main_~x~0) (<= main_~x~0 84)) (and .cse66 (<= 58 main_~x~0) .cse67 (<= main_~x~0 58)) (and (<= 78 main_~x~0) (<= main_~x~0 78) .cse46 .cse47) (and (<= main_~x~0 79) .cse68 .cse69 (<= 79 main_~x~0)) (and (<= 2 main_~x~0) (<= main_~x~0 2) .cse36 .cse37) (and (<= main_~x~0 17) .cse30 .cse31 (<= 17 main_~x~0)) (and .cse0 .cse1 (<= main_~x~0 33) (<= 33 main_~x~0)) (and .cse24 (<= main_~x~0 90) (<= 90 main_~x~0) .cse25) (and (<= main_~x~0 35) (<= 35 main_~x~0) .cse64 .cse65) (and (<= main_~x~0 93) .cse70 .cse71 (<= 93 main_~x~0)) (and .cse62 (<= main_~x~0 3) (<= 3 main_~x~0) .cse63) (and .cse72 (<= 86 main_~x~0) (<= main_~x~0 86) .cse73) (and .cse74 .cse75 (<= main_~x~0 85) (<= 85 main_~x~0)) (and .cse76 (<= main_~x~0 34) .cse77 (<= 34 main_~x~0)) (and (<= main_~x~0 62) (<= 62 main_~x~0) .cse28 .cse29) (and (<= 7 main_~x~0) (<= main_~x~0 7) .cse70 .cse71) (and (<= 39 main_~x~0) .cse8 (<= main_~x~0 39) .cse9) (and (<= 52 main_~x~0) .cse26 (<= main_~x~0 52) .cse27) (and (<= 32 main_~x~0) (<= main_~x~0 32) .cse50 .cse51) (and (<= 42 main_~x~0) .cse66 .cse67 (<= main_~x~0 42)) (and (<= 12 main_~x~0) (<= main_~x~0 12) .cse78 .cse79) (and (<= 71 main_~x~0) (<= main_~x~0 71) .cse80 .cse81) (and .cse82 (<= 6 main_~x~0) (<= main_~x~0 6) .cse83) (and .cse84 .cse85 (<= 95 main_~x~0) (<= main_~x~0 95)) (and .cse48 (<= 24 main_~x~0) (<= main_~x~0 24) .cse49) (and .cse86 (<= 57 main_~x~0) .cse87 (<= main_~x~0 57)) (and (<= 8 main_~x~0) .cse88 (<= main_~x~0 8) .cse89) (and .cse90 .cse91 (<= 13 main_~x~0) (<= main_~x~0 13)) (and .cse84 (<= main_~x~0 5) .cse85 (<= 5 main_~x~0)) (and .cse92 (<= 91 main_~x~0) (<= main_~x~0 91) .cse93) (and (<= main_~x~0 9) (<= 9 main_~x~0) .cse92 .cse93) (and .cse76 .cse77 (<= 66 main_~x~0) (<= main_~x~0 66)) (and (<= 15 main_~x~0) .cse74 .cse75 (<= main_~x~0 15)) (and .cse42 .cse43 (<= 69 main_~x~0) (<= main_~x~0 69)) (and .cse90 .cse91 (<= 87 main_~x~0) (<= main_~x~0 87)) (and (<= 0 main_~x~0) (<= main_~x~0 0) .cse44 .cse45) (and .cse72 (<= 14 main_~x~0) (<= main_~x~0 14) .cse73) (and .cse94 .cse95 (<= 37 main_~x~0) (<= main_~x~0 37)) (and .cse12 (<= 64 main_~x~0) .cse13 (<= main_~x~0 64)) (and .cse82 (<= main_~x~0 94) (<= 94 main_~x~0) .cse83) (and (<= main_~x~0 51) .cse18 (<= 51 main_~x~0) .cse19) (and .cse86 .cse87 (<= 43 main_~x~0) (<= main_~x~0 43)) (and (<= 60 main_~x~0) .cse60 .cse61 (<= main_~x~0 60)) (and (<= main_~x~0 59) (<= 59 main_~x~0) .cse96 .cse97) (and .cse88 .cse89 (<= 92 main_~x~0) (<= main_~x~0 92)) (and (<= 29 main_~x~0) .cse80 .cse81 (<= main_~x~0 29)) (and (<= 41 main_~x~0) .cse96 (<= main_~x~0 41) .cse97) (and .cse94 (<= main_~x~0 63) .cse95 (<= 63 main_~x~0)) (and (<= main_~x~0 82) (<= 82 main_~x~0) .cse54 .cse55) (and (<= main_~x~0 88) .cse78 .cse79 (<= 88 main_~x~0)) (and .cse14 (<= 96 main_~x~0) .cse15 (<= main_~x~0 96)) (and (<= main_~x~0 46) .cse6 .cse7 (<= 46 main_~x~0)) (and (<= main_~x~0 47) .cse98 .cse99 (<= 47 main_~x~0)) (and .cse98 .cse99 (<= 53 main_~x~0) (<= main_~x~0 53)) (and (<= main_~x~0 21) (<= 21 main_~x~0) .cse68 .cse69) (and .cse40 (<= 70 main_~x~0) .cse41 (<= main_~x~0 70)))) [2020-10-27 01:44:59,434 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 36) the Hoare annotation is: (and (< 99 main_~x~0) (<= main_~x~0 100)) [2020-10-27 01:44:59,434 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 39) no Hoare annotation was computed. [2020-10-27 01:44:59,434 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 39) no Hoare annotation was computed. [2020-10-27 01:44:59,435 INFO L274 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-10-27 01:44:59,435 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-27 01:44:59,435 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-27 01:44:59,435 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-27 01:44:59,435 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-27 01:44:59,435 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-27 01:44:59,435 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-27 01:44:59,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:44:59 BoogieIcfgContainer [2020-10-27 01:44:59,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:44:59,486 INFO L168 Benchmark]: Toolchain (without parser) took 187334.93 ms. Allocated memory was 151.0 MB in the beginning and 828.4 MB in the end (delta: 677.4 MB). Free memory was 126.3 MB in the beginning and 462.7 MB in the end (delta: -336.4 MB). Peak memory consumption was 522.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:44:59,487 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:44:59,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:44:59,488 INFO L168 Benchmark]: Boogie Preprocessor took 38.76 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 115.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:44:59,488 INFO L168 Benchmark]: RCFGBuilder took 369.50 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:44:59,489 INFO L168 Benchmark]: TraceAbstraction took 186644.14 ms. Allocated memory was 151.0 MB in the beginning and 828.4 MB in the end (delta: 677.4 MB). Free memory was 101.0 MB in the beginning and 462.7 MB in the end (delta: -361.8 MB). Peak memory consumption was 496.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:44:59,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.76 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 115.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.50 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 101.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 186644.14 ms. Allocated memory was 151.0 MB in the beginning and 828.4 MB in the end (delta: 677.4 MB). Free memory was 101.0 MB in the beginning and 462.7 MB in the end (delta: -361.8 MB). Peak memory consumption was 496.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 33 && 33 <= y) && x <= 67) && 67 <= x) || (((11 <= y && y <= 11) && 89 <= x) && x <= 89)) || (((x <= 23 && 23 <= y) && 23 <= x) && y <= 23)) || (((y <= 46 && 54 <= x) && 46 <= y) && x <= 54)) || (((x <= 61 && y <= 39) && 39 <= y) && 61 <= x)) || (((x <= 74 && 26 <= y) && 74 <= x) && y <= 26)) || (((x <= 36 && 36 <= x) && 36 <= y) && y <= 36)) || (((y <= 4 && 4 <= x) && 4 <= y) && x <= 4)) || (((y <= 44 && 44 <= y) && 56 <= x) && x <= 56)) || (((49 <= y && x <= 49) && y <= 49) && 49 <= x)) || (((28 <= y && x <= 28) && 28 <= x) && y <= 28)) || (((x <= 81 && y <= 19) && 19 <= y) && 81 <= x)) || (((y <= 10 && 10 <= x) && x <= 10) && 10 <= y)) || (((y <= 48 && 48 <= y) && 48 <= x) && x <= 48)) || (((38 <= x && x <= 38) && 38 <= y) && y <= 38)) || (((x <= 83 && 17 <= y) && 83 <= x) && y <= 17)) || (((45 <= y && y <= 45) && 45 <= x) && x <= 45)) || (((1 <= x && 1 <= y) && x <= 1) && y <= 1)) || (((98 <= x && 2 <= y) && x <= 98) && y <= 2)) || (((73 <= x && y <= 27) && x <= 73) && 27 <= y)) || (((x <= 26 && 26 <= y) && 26 <= x) && y <= 26)) || (((30 <= y && x <= 30) && y <= 30) && 30 <= x)) || (((1 <= y && x <= 99) && 99 <= x) && y <= 1)) || (((31 <= x && y <= 31) && 31 <= y) && x <= 31)) || (((y <= 0 && 99 < x) && 0 <= y) && x <= 100)) || (((x <= 22 && 22 <= x) && y <= 22) && 22 <= y)) || (((76 <= x && y <= 24) && 24 <= y) && x <= 76)) || (((x <= 77 && 23 <= y) && 77 <= x) && y <= 23)) || (((68 <= x && 32 <= y) && y <= 32) && x <= 68)) || (((11 <= y && x <= 11) && y <= 11) && 11 <= x)) || (((16 <= y && y <= 16) && 16 <= x) && x <= 16)) || (((18 <= x && y <= 18) && 18 <= y) && x <= 18)) || (((x <= 50 && 50 <= y) && 50 <= x) && y <= 50)) || (((25 <= x && 25 <= y) && x <= 25) && y <= 25)) || (((x <= 44 && y <= 44) && 44 <= y) && 44 <= x)) || (((19 <= x && y <= 19) && x <= 19) && 19 <= y)) || (((y <= 20 && 20 <= y) && 80 <= x) && x <= 80)) || (((40 <= x && 40 <= y) && x <= 40) && y <= 40)) || (((x <= 97 && y <= 3) && 3 <= y) && 97 <= x)) || (((75 <= x && 25 <= y) && y <= 25) && x <= 75)) || (((35 <= y && 65 <= x) && y <= 35) && x <= 65)) || (((55 <= x && y <= 45) && x <= 55) && 45 <= y)) || (((x <= 27 && y <= 27) && 27 <= y) && 27 <= x)) || (((x <= 72 && 28 <= y) && 72 <= x) && y <= 28)) || (((x <= 20 && y <= 20) && 20 <= x) && 20 <= y)) || (((16 <= y && y <= 16) && 84 <= x) && x <= 84)) || (((42 <= y && 58 <= x) && y <= 42) && x <= 58)) || (((78 <= x && x <= 78) && y <= 22) && 22 <= y)) || (((x <= 79 && y <= 21) && 21 <= y) && 79 <= x)) || (((2 <= x && x <= 2) && 2 <= y) && y <= 2)) || (((x <= 17 && 17 <= y) && y <= 17) && 17 <= x)) || (((y <= 33 && 33 <= y) && x <= 33) && 33 <= x)) || (((y <= 10 && x <= 90) && 90 <= x) && 10 <= y)) || (((x <= 35 && 35 <= x) && 35 <= y) && y <= 35)) || (((x <= 93 && 7 <= y) && y <= 7) && 93 <= x)) || (((y <= 3 && x <= 3) && 3 <= x) && 3 <= y)) || (((14 <= y && 86 <= x) && x <= 86) && y <= 14)) || (((y <= 15 && 15 <= y) && x <= 85) && 85 <= x)) || (((y <= 34 && x <= 34) && 34 <= y) && 34 <= x)) || (((x <= 62 && 62 <= x) && 38 <= y) && y <= 38)) || (((7 <= x && x <= 7) && 7 <= y) && y <= 7)) || (((39 <= x && y <= 39) && x <= 39) && 39 <= y)) || (((52 <= x && y <= 48) && x <= 52) && 48 <= y)) || (((32 <= x && x <= 32) && 32 <= y) && y <= 32)) || (((42 <= x && 42 <= y) && y <= 42) && x <= 42)) || (((12 <= x && x <= 12) && y <= 12) && 12 <= y)) || (((71 <= x && x <= 71) && 29 <= y) && y <= 29)) || (((y <= 6 && 6 <= x) && x <= 6) && 6 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || (((y <= 24 && 24 <= x) && x <= 24) && 24 <= y)) || (((43 <= y && 57 <= x) && y <= 43) && x <= 57)) || (((8 <= x && 8 <= y) && x <= 8) && y <= 8)) || (((13 <= y && y <= 13) && 13 <= x) && x <= 13)) || (((5 <= y && x <= 5) && y <= 5) && 5 <= x)) || (((9 <= y && 91 <= x) && x <= 91) && y <= 9)) || (((x <= 9 && 9 <= x) && 9 <= y) && y <= 9)) || (((y <= 34 && 34 <= y) && 66 <= x) && x <= 66)) || (((15 <= x && y <= 15) && 15 <= y) && x <= 15)) || (((y <= 31 && 31 <= y) && 69 <= x) && x <= 69)) || (((13 <= y && y <= 13) && 87 <= x) && x <= 87)) || (((0 <= x && x <= 0) && y <= 0) && 0 <= y)) || (((14 <= y && 14 <= x) && x <= 14) && y <= 14)) || (((y <= 37 && 37 <= y) && 37 <= x) && x <= 37)) || (((36 <= y && 64 <= x) && y <= 36) && x <= 64)) || (((y <= 6 && x <= 94) && 94 <= x) && 6 <= y)) || (((x <= 51 && 49 <= y) && 51 <= x) && y <= 49)) || (((43 <= y && y <= 43) && 43 <= x) && x <= 43)) || (((60 <= x && 40 <= y) && y <= 40) && x <= 60)) || (((x <= 59 && 59 <= x) && 41 <= y) && y <= 41)) || (((8 <= y && y <= 8) && 92 <= x) && x <= 92)) || (((29 <= x && 29 <= y) && y <= 29) && x <= 29)) || (((41 <= x && 41 <= y) && x <= 41) && y <= 41)) || (((y <= 37 && x <= 63) && 37 <= y) && 63 <= x)) || (((x <= 82 && 82 <= x) && y <= 18) && 18 <= y)) || (((x <= 88 && y <= 12) && 12 <= y) && 88 <= x)) || (((y <= 4 && 96 <= x) && 4 <= y) && x <= 96)) || (((x <= 46 && y <= 46) && 46 <= y) && 46 <= x)) || (((x <= 47 && 47 <= y) && y <= 47) && 47 <= x)) || (((47 <= y && y <= 47) && 53 <= x) && x <= 53)) || (((x <= 21 && 21 <= x) && y <= 21) && 21 <= y)) || (((30 <= y && 70 <= x) && y <= 30) && x <= 70) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 174.9s, OverallIterations: 22, TraceHistogramMax: 102, AutomataDifference: 72.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 463 SDtfs, 1642 SDslu, 2256 SDs, 0 SdLazy, 36207 SolverSat, 1592 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1334 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 1204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14815 ImplicationChecksByTransitivity, 63.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 1118 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 74 PreInvPairs, 176 NumberOfFragments, 1355 HoareAnnotationTreeSize, 74 FomulaSimplifications, 50348 FormulaSimplificationTreeSizeReduction, 2.7s HoareSimplificationTime, 9 FomulaSimplificationsInter, 7186 FormulaSimplificationTreeSizeReductionInter, 8.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 100.3s InterpolantComputationTime, 2386 NumberOfCodeBlocks, 2386 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 2364 ConstructedInterpolants, 0 QuantifiedInterpolants, 1606536 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 19546/61071 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...