/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:59:31,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:59:31,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:59:31,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:59:31,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:59:31,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:59:31,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:59:31,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:59:31,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:59:31,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:59:31,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:59:31,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:59:31,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:59:31,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:59:31,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:59:31,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:59:31,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:59:31,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:59:31,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:59:31,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:59:31,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:59:31,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:59:31,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:59:31,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:59:31,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:59:31,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:59:31,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:59:31,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:59:31,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:59:31,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:59:31,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:59:31,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:59:31,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:59:31,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:59:31,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:59:31,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:59:31,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:59:31,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:59:31,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:59:31,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:59:31,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:59:31,570 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 01:59:31,622 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:59:31,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:59:31,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:59:31,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:59:31,628 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:59:31,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:59:31,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:59:31,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:59:31,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:59:31,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:59:31,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:59:31,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:59:31,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:59:31,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:59:31,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:59:31,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:59:31,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:59:31,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:59:31,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:59:31,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:59:31,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:59:31,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:59:31,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:59:31,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:59:31,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:59:31,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:59:31,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:59:31,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:59:31,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:59:31,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:59:32,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:59:32,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:59:32,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:59:32,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:59:32,116 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:59:32,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2020-10-27 01:59:32,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c04d4605f/b5f4e0889cde48a39733660d06cde194/FLAGe1df4733b [2020-10-27 01:59:32,866 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:59:32,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/vogal-2.i [2020-10-27 01:59:32,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c04d4605f/b5f4e0889cde48a39733660d06cde194/FLAGe1df4733b [2020-10-27 01:59:33,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c04d4605f/b5f4e0889cde48a39733660d06cde194 [2020-10-27 01:59:33,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:59:33,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:59:33,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:59:33,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:59:33,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:59:33,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d23ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33, skipping insertion in model container [2020-10-27 01:59:33,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:59:33,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:59:33,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:59:33,451 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:59:33,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:59:33,533 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:59:33,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33 WrapperNode [2020-10-27 01:59:33,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:59:33,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:59:33,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:59:33,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:59:33,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (1/1) ... [2020-10-27 01:59:33,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:59:33,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:59:33,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:59:33,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:59:33,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (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 01:59:33,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:59:33,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:59:33,746 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:59:33,746 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:59:33,746 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:59:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:59:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:59:33,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:59:33,748 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:59:33,748 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:59:33,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:59:33,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:59:33,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 01:59:33,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:59:33,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:59:33,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:59:33,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:59:33,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:59:33,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:59:33,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:59:34,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:59:34,286 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 01:59:34,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:59:34 BoogieIcfgContainer [2020-10-27 01:59:34,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:59:34,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:59:34,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:59:34,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:59:34,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:59:33" (1/3) ... [2020-10-27 01:59:34,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ffbb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:59:34, skipping insertion in model container [2020-10-27 01:59:34,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:59:33" (2/3) ... [2020-10-27 01:59:34,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ffbb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:59:34, skipping insertion in model container [2020-10-27 01:59:34,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:59:34" (3/3) ... [2020-10-27 01:59:34,353 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2020-10-27 01:59:34,402 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:59:34,407 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:59:34,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:59:34,451 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:59:34,451 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:59:34,452 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:59:34,452 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:59:34,452 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:59:34,452 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:59:34,452 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:59:34,452 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:59:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-27 01:59:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:59:34,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:34,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:34,483 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1191415629, now seen corresponding path program 1 times [2020-10-27 01:59:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:34,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038307915] [2020-10-27 01:59:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:34,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:35,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:35,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:59:35,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:59:35,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-27 01:59:35,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:35,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:59:35,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:35,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:59:35,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:35,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:35,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:35,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:35,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:59:35,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:35,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:35,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:35,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:59:35,483 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 01:59:35,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038307915] [2020-10-27 01:59:35,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:59:35,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:59:35,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102342086] [2020-10-27 01:59:35,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:59:35,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:59:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:59:35,524 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-27 01:59:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:35,691 INFO L93 Difference]: Finished difference Result 71 states and 101 transitions. [2020-10-27 01:59:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:59:35,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-27 01:59:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:35,702 INFO L225 Difference]: With dead ends: 71 [2020-10-27 01:59:35,703 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:59:35,706 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 01:59:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:59:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:59:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:59:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-27 01:59:35,751 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2020-10-27 01:59:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:35,751 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-27 01:59:35,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:59:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-27 01:59:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:59:35,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:35,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:35,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:59:35,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:35,755 INFO L82 PathProgramCache]: Analyzing trace with hash 407305100, now seen corresponding path program 1 times [2020-10-27 01:59:35,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:35,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122904107] [2020-10-27 01:59:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:35,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:36,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:59:36,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:36,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-27 01:59:36,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:59:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:59:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:36,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:36,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:36,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:36,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:36,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:59:36,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:36,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:36,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:36,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:36,262 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 01:59:36,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122904107] [2020-10-27 01:59:36,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:59:36,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:59:36,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772023405] [2020-10-27 01:59:36,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:59:36,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:59:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:59:36,266 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2020-10-27 01:59:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:36,414 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2020-10-27 01:59:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:59:36,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:59:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:36,418 INFO L225 Difference]: With dead ends: 69 [2020-10-27 01:59:36,418 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 01:59:36,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:59:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 01:59:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2020-10-27 01:59:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 01:59:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-27 01:59:36,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2020-10-27 01:59:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:36,431 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-27 01:59:36,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:59:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-27 01:59:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 01:59:36,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:36,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:36,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:59:36,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1107970902, now seen corresponding path program 1 times [2020-10-27 01:59:36,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:36,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751310193] [2020-10-27 01:59:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:36,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:37,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:37,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:59:37,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 567 [2020-10-27 01:59:37,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:59:37,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:37,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:59:37,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:59:37,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:37,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:37,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:37,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:37,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:59:37,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:37,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:37,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:37,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751310193] [2020-10-27 01:59:37,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:37,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:59:37,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900245376] [2020-10-27 01:59:37,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:59:37,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:59:37,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:37,159 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 5 states. [2020-10-27 01:59:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:37,384 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-10-27 01:59:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:59:37,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 01:59:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:37,386 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:59:37,386 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:59:37,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:59:37,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:59:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-10-27 01:59:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:59:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-27 01:59:37,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2020-10-27 01:59:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:37,396 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-27 01:59:37,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:59:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-27 01:59:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:59:37,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:37,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:37,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:59:37,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1294295480, now seen corresponding path program 2 times [2020-10-27 01:59:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:37,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460877628] [2020-10-27 01:59:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:37,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:38,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:59:38,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-27 01:59:38,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:59:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:59:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:38,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:38,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:38,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:38,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:38,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:38,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:38,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:38,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:38,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:38,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460877628] [2020-10-27 01:59:38,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:38,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:59:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304377129] [2020-10-27 01:59:38,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:59:38,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:38,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:59:38,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:59:38,345 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 6 states. [2020-10-27 01:59:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:38,591 INFO L93 Difference]: Finished difference Result 99 states and 131 transitions. [2020-10-27 01:59:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:59:38,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-27 01:59:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:38,594 INFO L225 Difference]: With dead ends: 99 [2020-10-27 01:59:38,594 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:59:38,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:59:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:59:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 36. [2020-10-27 01:59:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 01:59:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-27 01:59:38,604 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2020-10-27 01:59:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:38,605 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-27 01:59:38,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:59:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-27 01:59:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:59:38,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:38,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:38,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:59:38,607 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:38,607 INFO L82 PathProgramCache]: Analyzing trace with hash 36411494, now seen corresponding path program 3 times [2020-10-27 01:59:38,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:38,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183441338] [2020-10-27 01:59:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:38,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:39,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:59:39,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-27 01:59:39,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:59:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:39,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:59:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:39,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:39,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:39,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:39,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:39,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:39,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:39,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:39,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:39,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:39,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183441338] [2020-10-27 01:59:39,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:39,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:59:39,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302529103] [2020-10-27 01:59:39,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:59:39,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:39,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:59:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:59:39,694 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 7 states. [2020-10-27 01:59:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:40,039 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2020-10-27 01:59:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:59:40,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:59:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:40,041 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:59:40,042 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:59:40,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:59:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:59:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 38. [2020-10-27 01:59:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:59:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-27 01:59:40,051 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2020-10-27 01:59:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:40,051 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-27 01:59:40,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:59:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-27 01:59:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:59:40,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:40,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:40,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:59:40,053 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1054440700, now seen corresponding path program 4 times [2020-10-27 01:59:40,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:40,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599804965] [2020-10-27 01:59:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:40,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:40,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:41,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 01:59:41,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:41,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1573 [2020-10-27 01:59:41,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:41,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:59:41,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:41,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:59:41,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:41,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:41,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:41,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:41,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:41,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:41,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:41,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:41,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:41,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599804965] [2020-10-27 01:59:41,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:41,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:59:41,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074859004] [2020-10-27 01:59:41,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:59:41,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:41,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:59:41,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:59:41,790 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 8 states. [2020-10-27 01:59:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:42,197 INFO L93 Difference]: Finished difference Result 129 states and 173 transitions. [2020-10-27 01:59:42,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:59:42,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 01:59:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:42,199 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:59:42,199 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:59:42,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:59:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:59:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 40. [2020-10-27 01:59:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:59:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-27 01:59:42,207 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2020-10-27 01:59:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:42,208 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-27 01:59:42,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:59:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-27 01:59:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:59:42,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:42,209 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:42,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:59:42,210 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:42,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1391378910, now seen corresponding path program 5 times [2020-10-27 01:59:42,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:42,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111638710] [2020-10-27 01:59:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:42,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:42,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:43,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:43,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:59:43,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:43,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1707 [2020-10-27 01:59:43,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:43,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:59:43,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:43,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:59:43,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:44,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:44,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:44,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:44,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:44,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:59:44,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:44,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:44,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:44,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111638710] [2020-10-27 01:59:44,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:44,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:59:44,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982075512] [2020-10-27 01:59:44,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:59:44,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:59:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:59:44,098 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 9 states. [2020-10-27 01:59:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:44,649 INFO L93 Difference]: Finished difference Result 144 states and 194 transitions. [2020-10-27 01:59:44,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:59:44,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-27 01:59:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:44,652 INFO L225 Difference]: With dead ends: 144 [2020-10-27 01:59:44,652 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:59:44,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:59:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:59:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 42. [2020-10-27 01:59:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:59:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-27 01:59:44,661 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2020-10-27 01:59:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:44,661 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-27 01:59:44,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:59:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-27 01:59:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:59:44,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:44,663 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:44,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:59:44,664 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1228515776, now seen corresponding path program 6 times [2020-10-27 01:59:44,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:44,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019446444] [2020-10-27 01:59:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:44,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:46,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:46,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:59:46,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:46,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-27 01:59:46,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:46,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:59:46,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:46,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:59:46,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:46,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:46,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:46,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:46,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:46,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:46,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:59:46,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:46,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:46,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:46,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:46,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019446444] [2020-10-27 01:59:46,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:46,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:59:46,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405142022] [2020-10-27 01:59:46,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:59:46,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:59:46,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:59:46,901 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 10 states. [2020-10-27 01:59:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:47,540 INFO L93 Difference]: Finished difference Result 159 states and 215 transitions. [2020-10-27 01:59:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:59:47,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 01:59:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:47,546 INFO L225 Difference]: With dead ends: 159 [2020-10-27 01:59:47,546 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 01:59:47,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:59:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 01:59:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 44. [2020-10-27 01:59:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:59:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-27 01:59:47,563 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-10-27 01:59:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:47,563 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-27 01:59:47,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:59:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-27 01:59:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:59:47,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:47,568 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:47,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:59:47,568 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2096473566, now seen corresponding path program 7 times [2020-10-27 01:59:47,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:47,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005756400] [2020-10-27 01:59:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:50,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:50,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:59:50,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:50,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2966 [2020-10-27 01:59:50,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:59:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:59:50,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:50,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:50,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:50,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:50,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:50,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:50,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:50,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005756400] [2020-10-27 01:59:50,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:50,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:59:50,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436342600] [2020-10-27 01:59:50,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:59:50,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:50,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:59:50,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:59:50,754 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 11 states. [2020-10-27 01:59:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:51,596 INFO L93 Difference]: Finished difference Result 174 states and 236 transitions. [2020-10-27 01:59:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:59:51,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 01:59:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:51,598 INFO L225 Difference]: With dead ends: 174 [2020-10-27 01:59:51,599 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 01:59:51,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:59:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 01:59:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 46. [2020-10-27 01:59:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:59:51,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-27 01:59:51,608 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2020-10-27 01:59:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:51,608 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-27 01:59:51,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:59:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-27 01:59:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:59:51,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:51,610 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:51,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:59:51,610 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1314712964, now seen corresponding path program 8 times [2020-10-27 01:59:51,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:51,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088555968] [2020-10-27 01:59:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:51,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:51,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:54,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:54,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:59:54,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3267 [2020-10-27 01:59:54,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:59:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:59:54,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:55,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:55,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:55,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:55,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:55,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:55,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:55,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:55,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:55,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088555968] [2020-10-27 01:59:55,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:55,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:59:55,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217798836] [2020-10-27 01:59:55,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:59:55,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:55,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:59:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:59:55,101 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2020-10-27 01:59:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:59:56,012 INFO L93 Difference]: Finished difference Result 189 states and 257 transitions. [2020-10-27 01:59:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:59:56,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 01:59:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:59:56,014 INFO L225 Difference]: With dead ends: 189 [2020-10-27 01:59:56,014 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 01:59:56,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:59:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 01:59:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 48. [2020-10-27 01:59:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:59:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-27 01:59:56,022 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-10-27 01:59:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:59:56,023 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-27 01:59:56,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:59:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-27 01:59:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:59:56,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:59:56,024 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:59:56,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:59:56,024 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:59:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:59:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1890045850, now seen corresponding path program 9 times [2020-10-27 01:59:56,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:59:56,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835817137] [2020-10-27 01:59:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:59:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:56,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:56,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:59,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:59,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:59:59,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:59:59,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3723 [2020-10-27 01:59:59,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:59:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:59:59,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:59:59,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:59,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:59:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:59:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:59:59,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:59:59,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:59:59,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:59:59,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:59:59,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:59:59,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:59:59,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:59:59,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:59:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:59:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:59:59,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835817137] [2020-10-27 01:59:59,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:59:59,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:59:59,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753292795] [2020-10-27 01:59:59,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:59:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:59:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:59:59,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:59:59,989 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-10-27 02:00:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:01,147 INFO L93 Difference]: Finished difference Result 204 states and 278 transitions. [2020-10-27 02:00:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 02:00:01,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 02:00:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:01,152 INFO L225 Difference]: With dead ends: 204 [2020-10-27 02:00:01,152 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 02:00:01,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 02:00:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 02:00:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 50. [2020-10-27 02:00:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 02:00:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-27 02:00:01,159 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 39 [2020-10-27 02:00:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:01,159 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-27 02:00:01,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 02:00:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-27 02:00:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 02:00:01,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:01,160 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:01,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 02:00:01,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:01,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2123252424, now seen corresponding path program 10 times [2020-10-27 02:00:01,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:01,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135328714] [2020-10-27 02:00:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:01,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:01,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:01,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 02:00:01,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:01,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 02:00:01,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:01,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 02:00:01,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 02:00:01,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 02:00:01,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:01,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:01,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:01,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:01,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:01,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:01,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 02:00:01,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:01,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:01,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 02:00:01,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135328714] [2020-10-27 02:00:01,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 02:00:01,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 02:00:01,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351457101] [2020-10-27 02:00:01,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 02:00:01,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:01,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 02:00:01,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 02:00:01,668 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 7 states. [2020-10-27 02:00:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:01,866 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-10-27 02:00:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 02:00:01,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-27 02:00:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:01,867 INFO L225 Difference]: With dead ends: 76 [2020-10-27 02:00:01,867 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 02:00:01,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 02:00:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 02:00:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-27 02:00:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 02:00:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-27 02:00:01,882 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 41 [2020-10-27 02:00:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:01,883 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-27 02:00:01,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 02:00:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-27 02:00:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 02:00:01,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:01,886 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:01,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 02:00:01,887 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:01,887 INFO L82 PathProgramCache]: Analyzing trace with hash -598811119, now seen corresponding path program 1 times [2020-10-27 02:00:01,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322947743] [2020-10-27 02:00:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:01,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:01,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:02,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:06,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:06,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 02:00:06,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:00:06,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 02:00:06,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 02:00:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:06,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 02:00:06,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:07,528 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-27 02:00:08,049 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2020-10-27 02:00:08,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:08,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:08,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 02:00:08,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322947743] [2020-10-27 02:00:08,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:08,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 02:00:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638486035] [2020-10-27 02:00:08,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 02:00:08,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 02:00:08,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 02:00:08,184 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 10 states. [2020-10-27 02:00:08,707 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-10-27 02:00:09,005 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2020-10-27 02:00:09,470 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 94 [2020-10-27 02:00:09,969 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 83 [2020-10-27 02:00:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:10,116 INFO L93 Difference]: Finished difference Result 111 states and 141 transitions. [2020-10-27 02:00:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 02:00:10,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-27 02:00:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:10,119 INFO L225 Difference]: With dead ends: 111 [2020-10-27 02:00:10,119 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 02:00:10,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-27 02:00:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 02:00:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-27 02:00:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 02:00:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-10-27 02:00:10,137 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 47 [2020-10-27 02:00:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:10,137 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-10-27 02:00:10,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 02:00:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-10-27 02:00:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 02:00:10,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:10,146 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:10,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 02:00:10,146 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:10,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2084540536, now seen corresponding path program 1 times [2020-10-27 02:00:10,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:10,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863512741] [2020-10-27 02:00:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:10,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:11,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:15,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:15,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 02:00:15,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:00:15,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 02:00:15,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 02:00:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:15,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 02:00:15,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:15,539 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-10-27 02:00:15,659 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-27 02:00:16,070 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 74 [2020-10-27 02:00:16,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:16,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:16,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:16,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:16,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:16,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:00:16,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 02:00:16,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863512741] [2020-10-27 02:00:16,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 02:00:16,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 02:00:16,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091557047] [2020-10-27 02:00:16,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 02:00:16,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 02:00:16,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 02:00:16,195 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 9 states. [2020-10-27 02:00:16,526 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2020-10-27 02:00:16,797 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-27 02:00:17,096 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-27 02:00:17,486 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2020-10-27 02:00:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:17,614 INFO L93 Difference]: Finished difference Result 140 states and 182 transitions. [2020-10-27 02:00:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 02:00:17,615 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-27 02:00:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:17,616 INFO L225 Difference]: With dead ends: 140 [2020-10-27 02:00:17,616 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 02:00:17,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-27 02:00:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 02:00:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2020-10-27 02:00:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 02:00:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-27 02:00:17,647 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 48 [2020-10-27 02:00:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:17,647 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-27 02:00:17,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 02:00:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-27 02:00:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 02:00:17,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:17,649 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:17,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 02:00:17,649 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2077528835, now seen corresponding path program 1 times [2020-10-27 02:00:17,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:17,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441050961] [2020-10-27 02:00:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:17,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:17,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:19,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:22,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:22,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 02:00:22,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:00:22,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 02:00:22,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:22,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 02:00:22,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:22,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 02:00:22,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:22,940 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-27 02:00:23,580 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 91 [2020-10-27 02:00:24,107 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 88 [2020-10-27 02:00:24,774 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 103 [2020-10-27 02:00:24,913 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-27 02:00:25,323 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 74 [2020-10-27 02:00:25,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:25,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:25,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:25,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:25,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:00:25,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:25,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:25,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:25,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-10-27 02:00:25,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441050961] [2020-10-27 02:00:25,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:25,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 02:00:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805742908] [2020-10-27 02:00:25,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 02:00:25,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 02:00:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 02:00:25,466 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 11 states. [2020-10-27 02:00:25,718 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-27 02:00:25,984 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2020-10-27 02:00:26,307 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 105 [2020-10-27 02:00:26,655 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 97 [2020-10-27 02:00:26,937 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 90 [2020-10-27 02:00:27,400 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 116 [2020-10-27 02:00:27,827 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 106 [2020-10-27 02:00:28,128 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-27 02:00:28,377 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-27 02:00:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:28,586 INFO L93 Difference]: Finished difference Result 135 states and 171 transitions. [2020-10-27 02:00:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 02:00:28,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 02:00:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:28,588 INFO L225 Difference]: With dead ends: 135 [2020-10-27 02:00:28,588 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 02:00:28,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-27 02:00:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 02:00:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-27 02:00:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 02:00:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-27 02:00:28,604 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 50 [2020-10-27 02:00:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:28,605 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-27 02:00:28,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 02:00:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-27 02:00:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 02:00:28,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:28,606 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:28,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 02:00:28,606 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:28,607 INFO L82 PathProgramCache]: Analyzing trace with hash 266604800, now seen corresponding path program 1 times [2020-10-27 02:00:28,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:28,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132115547] [2020-10-27 02:00:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:28,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:28,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:28,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:30,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:30,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:31,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:33,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:33,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 02:00:33,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 02:00:33,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 02:00:33,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 02:00:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 02:00:33,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:34,038 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-27 02:00:34,225 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 57 [2020-10-27 02:00:34,346 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 02:00:34,892 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 66 [2020-10-27 02:00:34,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:34,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 02:00:35,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132115547] [2020-10-27 02:00:35,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:35,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 02:00:35,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723343651] [2020-10-27 02:00:35,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 02:00:35,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 02:00:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 02:00:35,016 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 11 states. [2020-10-27 02:00:35,217 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-27 02:00:35,369 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-27 02:00:35,534 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 02:00:35,781 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-27 02:00:36,030 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-27 02:00:36,435 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 84 [2020-10-27 02:00:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:36,731 INFO L93 Difference]: Finished difference Result 202 states and 264 transitions. [2020-10-27 02:00:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 02:00:36,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-27 02:00:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:36,734 INFO L225 Difference]: With dead ends: 202 [2020-10-27 02:00:36,734 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 02:00:36,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-27 02:00:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 02:00:36,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 98. [2020-10-27 02:00:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 02:00:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2020-10-27 02:00:36,758 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 52 [2020-10-27 02:00:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:36,759 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2020-10-27 02:00:36,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 02:00:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2020-10-27 02:00:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 02:00:36,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:36,759 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:36,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 02:00:36,760 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:36,761 INFO L82 PathProgramCache]: Analyzing trace with hash -936271802, now seen corresponding path program 2 times [2020-10-27 02:00:36,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:36,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913392480] [2020-10-27 02:00:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:36,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:36,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:36,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:36,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3416 [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 02:00:40,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 02:00:40,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 02:00:40,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:40,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:40,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:40,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:40,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-10-27 02:00:40,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913392480] [2020-10-27 02:00:40,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 02:00:40,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 02:00:40,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808431430] [2020-10-27 02:00:40,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 02:00:40,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:40,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 02:00:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 02:00:40,369 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand 8 states. [2020-10-27 02:00:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:40,665 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2020-10-27 02:00:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 02:00:40,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-27 02:00:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:40,666 INFO L225 Difference]: With dead ends: 123 [2020-10-27 02:00:40,666 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 02:00:40,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 02:00:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 02:00:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-27 02:00:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 02:00:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2020-10-27 02:00:40,689 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 52 [2020-10-27 02:00:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:40,689 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2020-10-27 02:00:40,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 02:00:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2020-10-27 02:00:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 02:00:40,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:40,690 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:40,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 02:00:40,691 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:40,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1152337047, now seen corresponding path program 1 times [2020-10-27 02:00:40,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:40,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458662523] [2020-10-27 02:00:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:40,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:40,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 02:00:41,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 02:00:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:41,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:41,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:41,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:41,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:41,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 02:00:41,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:41,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:41,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 02:00:41,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458662523] [2020-10-27 02:00:41,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 02:00:41,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 02:00:41,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085953264] [2020-10-27 02:00:41,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 02:00:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:41,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 02:00:41,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 02:00:41,340 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand 4 states. [2020-10-27 02:00:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:41,491 INFO L93 Difference]: Finished difference Result 162 states and 214 transitions. [2020-10-27 02:00:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 02:00:41,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-27 02:00:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:41,494 INFO L225 Difference]: With dead ends: 162 [2020-10-27 02:00:41,494 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 02:00:41,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 02:00:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 02:00:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2020-10-27 02:00:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 02:00:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2020-10-27 02:00:41,538 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 53 [2020-10-27 02:00:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:41,538 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2020-10-27 02:00:41,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 02:00:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2020-10-27 02:00:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 02:00:41,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:41,540 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:41,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 02:00:41,540 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1416699460, now seen corresponding path program 1 times [2020-10-27 02:00:41,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:41,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418118626] [2020-10-27 02:00:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:41,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:41,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:42,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:46,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:46,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:46,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 02:00:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 02:00:46,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 02:00:46,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:46,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 02:00:46,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:00:46,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 02:00:46,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 02:00:47,258 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 40 [2020-10-27 02:00:47,590 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 33 [2020-10-27 02:00:47,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:47,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:47,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:47,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:47,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 02:00:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418118626] [2020-10-27 02:00:47,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:47,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 02:00:47,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080596761] [2020-10-27 02:00:47,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 02:00:47,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 02:00:47,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 02:00:47,772 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 13 states. [2020-10-27 02:00:49,170 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 02:00:49,431 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-27 02:00:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:49,752 INFO L93 Difference]: Finished difference Result 211 states and 270 transitions. [2020-10-27 02:00:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 02:00:49,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-27 02:00:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:49,754 INFO L225 Difference]: With dead ends: 211 [2020-10-27 02:00:49,754 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 02:00:49,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2020-10-27 02:00:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 02:00:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 132. [2020-10-27 02:00:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 02:00:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2020-10-27 02:00:49,793 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 56 [2020-10-27 02:00:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:49,794 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2020-10-27 02:00:49,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 02:00:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2020-10-27 02:00:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 02:00:49,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:49,795 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:49,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 02:00:49,795 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:49,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1886189730, now seen corresponding path program 1 times [2020-10-27 02:00:49,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:49,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773713718] [2020-10-27 02:00:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:51,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:54,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:54,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 02:00:54,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 02:00:54,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 02:00:54,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 02:00:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 02:00:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 02:00:54,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:55,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:00:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:55,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:55,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:00:55,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:00:55,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:00:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-27 02:00:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773713718] [2020-10-27 02:00:55,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:00:55,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 02:00:55,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199951338] [2020-10-27 02:00:55,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 02:00:55,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:00:55,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 02:00:55,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 02:00:55,028 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand 8 states. [2020-10-27 02:00:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:00:55,364 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2020-10-27 02:00:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 02:00:55,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-27 02:00:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:00:55,366 INFO L225 Difference]: With dead ends: 164 [2020-10-27 02:00:55,366 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 02:00:55,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 02:00:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 02:00:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 121. [2020-10-27 02:00:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 02:00:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-10-27 02:00:55,401 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 57 [2020-10-27 02:00:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:00:55,402 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-10-27 02:00:55,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 02:00:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-10-27 02:00:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 02:00:55,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:00:55,403 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:00:55,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 02:00:55,403 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:00:55,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:00:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash 283310812, now seen corresponding path program 1 times [2020-10-27 02:00:55,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:00:55,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312489257] [2020-10-27 02:00:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:00:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:00:55,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:55,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:55,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:56,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:56,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:00:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:00,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:00,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 02:01:00,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:00,759 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-10-27 02:01:01,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:01,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:01,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:01,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:01,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:01,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:01,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:01,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:01,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:01,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-10-27 02:01:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312489257] [2020-10-27 02:01:01,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:01,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 02:01:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617110046] [2020-10-27 02:01:01,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 02:01:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 02:01:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 02:01:01,113 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 11 states. [2020-10-27 02:01:01,574 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-27 02:01:01,841 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-27 02:01:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:02,230 INFO L93 Difference]: Finished difference Result 205 states and 259 transitions. [2020-10-27 02:01:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 02:01:02,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-27 02:01:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:02,236 INFO L225 Difference]: With dead ends: 205 [2020-10-27 02:01:02,236 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 02:01:02,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-27 02:01:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 02:01:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2020-10-27 02:01:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-27 02:01:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-27 02:01:02,275 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 59 [2020-10-27 02:01:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:02,276 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-27 02:01:02,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 02:01:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-27 02:01:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 02:01:02,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:02,277 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:02,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 02:01:02,277 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1003930306, now seen corresponding path program 1 times [2020-10-27 02:01:02,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:02,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15353244] [2020-10-27 02:01:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:02,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:02,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:02,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:04,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:06,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:06,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 02:01:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:07,713 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 02:01:07,892 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-27 02:01:08,400 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 70 [2020-10-27 02:01:09,065 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 113 [2020-10-27 02:01:09,653 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 118 [2020-10-27 02:01:10,830 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 323 DAG size of output: 114 [2020-10-27 02:01:10,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:10,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:10,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 02:01:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15353244] [2020-10-27 02:01:10,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:11,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 02:01:11,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758175832] [2020-10-27 02:01:11,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 02:01:11,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:11,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 02:01:11,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 02:01:11,001 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 13 states. [2020-10-27 02:01:11,572 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-27 02:01:11,951 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 101 [2020-10-27 02:01:12,524 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 101 [2020-10-27 02:01:13,192 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 102 [2020-10-27 02:01:13,550 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-27 02:01:14,232 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 100 [2020-10-27 02:01:14,666 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 95 [2020-10-27 02:01:15,397 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 106 [2020-10-27 02:01:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:15,644 INFO L93 Difference]: Finished difference Result 232 states and 293 transitions. [2020-10-27 02:01:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 02:01:15,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-27 02:01:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:15,649 INFO L225 Difference]: With dead ends: 232 [2020-10-27 02:01:15,649 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 02:01:15,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-27 02:01:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 02:01:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 138. [2020-10-27 02:01:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 02:01:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 169 transitions. [2020-10-27 02:01:15,689 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 169 transitions. Word has length 62 [2020-10-27 02:01:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:15,690 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 169 transitions. [2020-10-27 02:01:15,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 02:01:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 169 transitions. [2020-10-27 02:01:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 02:01:15,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:15,691 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:15,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 02:01:15,691 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:15,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash -275933372, now seen corresponding path program 2 times [2020-10-27 02:01:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:15,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156388052] [2020-10-27 02:01:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:15,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:15,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:15,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:20,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:20,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 02:01:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:21,145 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 29 [2020-10-27 02:01:21,263 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 26 [2020-10-27 02:01:21,583 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2020-10-27 02:01:21,855 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 52 [2020-10-27 02:01:21,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:21,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:21,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-27 02:01:21,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156388052] [2020-10-27 02:01:21,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:21,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 02:01:21,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766021328] [2020-10-27 02:01:21,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 02:01:21,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:21,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 02:01:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 02:01:21,947 INFO L87 Difference]: Start difference. First operand 138 states and 169 transitions. Second operand 14 states. [2020-10-27 02:01:24,771 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-27 02:01:25,088 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2020-10-27 02:01:25,294 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 36 [2020-10-27 02:01:25,676 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-27 02:01:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:26,009 INFO L93 Difference]: Finished difference Result 330 states and 422 transitions. [2020-10-27 02:01:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 02:01:26,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-27 02:01:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:26,011 INFO L225 Difference]: With dead ends: 330 [2020-10-27 02:01:26,012 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 02:01:26,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-27 02:01:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 02:01:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 195. [2020-10-27 02:01:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 02:01:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 246 transitions. [2020-10-27 02:01:26,070 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 246 transitions. Word has length 62 [2020-10-27 02:01:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:26,071 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 246 transitions. [2020-10-27 02:01:26,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 02:01:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 246 transitions. [2020-10-27 02:01:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 02:01:26,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:26,072 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:26,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 02:01:26,072 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:26,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2024889218, now seen corresponding path program 1 times [2020-10-27 02:01:26,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:26,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88609251] [2020-10-27 02:01:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:26,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:26,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:26,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:26,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 02:01:31,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:31,504 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 42 [2020-10-27 02:01:31,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:31,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:31,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:31,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-10-27 02:01:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88609251] [2020-10-27 02:01:31,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:31,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 02:01:31,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145094749] [2020-10-27 02:01:31,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 02:01:31,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:31,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 02:01:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 02:01:31,579 INFO L87 Difference]: Start difference. First operand 195 states and 246 transitions. Second operand 11 states. [2020-10-27 02:01:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:32,419 INFO L93 Difference]: Finished difference Result 304 states and 383 transitions. [2020-10-27 02:01:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 02:01:32,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-27 02:01:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:32,422 INFO L225 Difference]: With dead ends: 304 [2020-10-27 02:01:32,422 INFO L226 Difference]: Without dead ends: 261 [2020-10-27 02:01:32,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-27 02:01:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-27 02:01:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 188. [2020-10-27 02:01:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 02:01:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 237 transitions. [2020-10-27 02:01:32,478 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 237 transitions. Word has length 62 [2020-10-27 02:01:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:32,478 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 237 transitions. [2020-10-27 02:01:32,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 02:01:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 237 transitions. [2020-10-27 02:01:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 02:01:32,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:32,479 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:32,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 02:01:32,480 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash 674848196, now seen corresponding path program 1 times [2020-10-27 02:01:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:32,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599195491] [2020-10-27 02:01:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:32,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:34,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 02:01:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:39,277 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 379 DAG size of output: 137 [2020-10-27 02:01:41,071 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 408 DAG size of output: 165 [2020-10-27 02:01:42,220 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 355 DAG size of output: 65 [2020-10-27 02:01:42,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:42,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:42,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:42,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:42,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:42,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:42,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:42,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:42,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:42,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 02:01:42,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599195491] [2020-10-27 02:01:42,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:42,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 02:01:42,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202853555] [2020-10-27 02:01:42,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 02:01:42,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 02:01:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 02:01:42,374 INFO L87 Difference]: Start difference. First operand 188 states and 237 transitions. Second operand 9 states. [2020-10-27 02:01:43,337 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 152 [2020-10-27 02:01:44,246 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 182 [2020-10-27 02:01:44,691 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2020-10-27 02:01:45,536 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 156 [2020-10-27 02:01:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:45,670 INFO L93 Difference]: Finished difference Result 226 states and 285 transitions. [2020-10-27 02:01:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 02:01:45,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-27 02:01:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:45,672 INFO L225 Difference]: With dead ends: 226 [2020-10-27 02:01:45,672 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 02:01:45,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 02:01:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 02:01:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-10-27 02:01:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 02:01:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 245 transitions. [2020-10-27 02:01:45,746 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 245 transitions. Word has length 62 [2020-10-27 02:01:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:45,747 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 245 transitions. [2020-10-27 02:01:45,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 02:01:45,747 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 245 transitions. [2020-10-27 02:01:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 02:01:45,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:45,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:45,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 02:01:45,748 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash 933013634, now seen corresponding path program 2 times [2020-10-27 02:01:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:45,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684969612] [2020-10-27 02:01:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:45,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:45,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:47,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:47,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 02:01:47,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 02:01:47,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-10-27 02:01:47,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 02:01:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 02:01:47,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 02:01:47,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:47,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:47,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:47,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-27 02:01:47,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684969612] [2020-10-27 02:01:47,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:47,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 02:01:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401021535] [2020-10-27 02:01:47,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 02:01:47,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 02:01:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 02:01:47,326 INFO L87 Difference]: Start difference. First operand 196 states and 245 transitions. Second operand 5 states. [2020-10-27 02:01:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:01:47,497 INFO L93 Difference]: Finished difference Result 280 states and 353 transitions. [2020-10-27 02:01:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 02:01:47,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-27 02:01:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:01:47,506 INFO L225 Difference]: With dead ends: 280 [2020-10-27 02:01:47,506 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 02:01:47,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 02:01:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 02:01:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2020-10-27 02:01:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 02:01:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 231 transitions. [2020-10-27 02:01:47,579 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 231 transitions. Word has length 62 [2020-10-27 02:01:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:01:47,579 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 231 transitions. [2020-10-27 02:01:47,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 02:01:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 231 transitions. [2020-10-27 02:01:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 02:01:47,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:01:47,580 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:01:47,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 02:01:47,581 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:01:47,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:01:47,581 INFO L82 PathProgramCache]: Analyzing trace with hash 623991883, now seen corresponding path program 1 times [2020-10-27 02:01:47,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:01:47,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104752125] [2020-10-27 02:01:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:01:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:47,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:47,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:47,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:52,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:52,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:52,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 02:01:52,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 02:01:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-27 02:01:52,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 02:01:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:01:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 02:01:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:53,228 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2020-10-27 02:01:53,543 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2020-10-27 02:01:53,805 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 43 [2020-10-27 02:01:54,121 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2020-10-27 02:01:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:01:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:01:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:01:54,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:01:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:01:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 02:01:54,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104752125] [2020-10-27 02:01:54,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:01:54,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 02:01:54,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574348441] [2020-10-27 02:01:54,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 02:01:54,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:01:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 02:01:54,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 02:01:54,543 INFO L87 Difference]: Start difference. First operand 188 states and 231 transitions. Second operand 16 states. [2020-10-27 02:01:54,720 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-27 02:01:54,997 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-27 02:01:55,224 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-27 02:01:55,514 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-27 02:01:55,799 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-27 02:01:56,000 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-27 02:01:56,354 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-27 02:01:56,545 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-27 02:01:56,879 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-27 02:01:57,074 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-27 02:01:57,900 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-27 02:02:05,619 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-27 02:02:06,021 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-27 02:02:06,514 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-27 02:02:06,797 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-27 02:02:07,128 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-27 02:02:07,495 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-27 02:02:07,790 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-27 02:02:08,045 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-27 02:02:08,363 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-27 02:02:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:02:08,607 INFO L93 Difference]: Finished difference Result 569 states and 734 transitions. [2020-10-27 02:02:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 02:02:08,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-27 02:02:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:02:08,612 INFO L225 Difference]: With dead ends: 569 [2020-10-27 02:02:08,612 INFO L226 Difference]: Without dead ends: 465 [2020-10-27 02:02:08,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 02:02:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-27 02:02:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 305. [2020-10-27 02:02:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-10-27 02:02:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 377 transitions. [2020-10-27 02:02:08,772 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 377 transitions. Word has length 65 [2020-10-27 02:02:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:02:08,775 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 377 transitions. [2020-10-27 02:02:08,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 02:02:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 377 transitions. [2020-10-27 02:02:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 02:02:08,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:02:08,777 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:02:08,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 02:02:08,777 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:02:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:02:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash 541095462, now seen corresponding path program 2 times [2020-10-27 02:02:08,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:02:08,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541479905] [2020-10-27 02:02:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:02:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:02:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:08,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:08,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:09,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:10,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:11,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:11,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:11,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:13,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:02:13,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 02:02:13,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 02:02:13,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 02:02:13,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:02:13,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 02:02:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:02:13,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 02:02:13,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:02:14,077 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2020-10-27 02:02:14,370 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 25 [2020-10-27 02:02:14,574 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2020-10-27 02:02:15,098 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-10-27 02:02:15,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:02:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:02:15,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:15,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:02:15,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:02:15,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:02:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 02:02:15,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:02:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:02:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:02:15,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:02:15,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:02:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-27 02:02:15,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541479905] [2020-10-27 02:02:15,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:02:15,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 02:02:15,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442197065] [2020-10-27 02:02:15,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 02:02:15,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:02:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 02:02:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 02:02:15,480 INFO L87 Difference]: Start difference. First operand 305 states and 377 transitions. Second operand 14 states. [2020-10-27 02:02:15,898 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-27 02:02:16,084 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-27 02:02:16,248 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-27 02:02:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 02:02:17,263 INFO L93 Difference]: Finished difference Result 617 states and 766 transitions. [2020-10-27 02:02:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 02:02:17,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-10-27 02:02:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 02:02:17,267 INFO L225 Difference]: With dead ends: 617 [2020-10-27 02:02:17,268 INFO L226 Difference]: Without dead ends: 519 [2020-10-27 02:02:17,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2020-10-27 02:02:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-10-27 02:02:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 306. [2020-10-27 02:02:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 02:02:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 379 transitions. [2020-10-27 02:02:17,419 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 379 transitions. Word has length 74 [2020-10-27 02:02:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 02:02:17,420 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 379 transitions. [2020-10-27 02:02:17,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 02:02:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 379 transitions. [2020-10-27 02:02:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 02:02:17,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 02:02:17,424 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 02:02:17,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 02:02:17,424 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 02:02:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 02:02:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash 146728676, now seen corresponding path program 3 times [2020-10-27 02:02:17,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 02:02:17,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442003513] [2020-10-27 02:02:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 02:02:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:02:17,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:17,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:18,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:22,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:02:22,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 02:02:22,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 02:02:22,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 02:02:22,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:02:22,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 02:02:22,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 02:02:22,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 02:02:22,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:02:22,811 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-27 02:02:23,054 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-27 02:02:23,215 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-27 02:02:23,709 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 55 [2020-10-27 02:02:24,187 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2020-10-27 02:02:24,405 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-10-27 02:02:24,571 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 23 [2020-10-27 02:02:24,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 02:02:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 02:02:24,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 02:02:24,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 02:02:24,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 02:02:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 2 proven. 53 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-27 02:02:24,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442003513] [2020-10-27 02:02:24,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 02:02:24,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 02:02:24,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372965334] [2020-10-27 02:02:24,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 02:02:24,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 02:02:24,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 02:02:24,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-27 02:02:24,909 INFO L87 Difference]: Start difference. First operand 306 states and 379 transitions. Second operand 18 states. [2020-10-27 02:02:25,266 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-27 02:02:25,471 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-27 02:02:25,751 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-27 02:02:25,927 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 02:02:26,216 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-27 02:02:26,470 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-27 02:02:27,086 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-27 02:02:27,365 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-27 02:02:27,629 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 02:02:29,003 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-27 02:02:29,221 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 02:02:29,602 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-10-27 02:02:29,825 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 02:02:30,150 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-27 02:02:30,732 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-27 02:02:30,966 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 02:02:31,530 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-27 02:02:34,086 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-27 02:02:34,366 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 02:02:36,179 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-27 02:02:36,728 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-10-27 02:02:36,893 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 02:02:37,320 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-27 02:02:37,709 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-27 02:02:38,098 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 02:02:38,498 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-27 02:02:41,228 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 02:02:41,680 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 02:02:42,550 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2020-10-27 02:02:42,775 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 02:02:49,723 WARN L193 SmtUtils]: Spent 6.77 s on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2020-10-27 02:02:50,347 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-27 02:03:02,226 WARN L193 SmtUtils]: Spent 11.74 s on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2020-10-27 02:03:04,737 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-27 02:03:05,375 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-27 02:03:08,377 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2020-10-27 02:03:08,617 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-27 02:03:11,393 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 98 DAG size of output: 79