/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:30:24,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:30:24,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:30:24,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:30:24,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:30:24,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:30:24,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:30:24,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:30:24,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:30:24,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:30:24,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:30:24,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:30:24,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:30:24,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:30:24,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:30:24,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:30:24,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:30:24,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:30:24,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:30:24,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:30:24,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:30:24,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:30:24,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:30:24,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:30:24,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:30:24,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:30:24,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:30:24,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:30:24,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:30:24,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:30:24,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:30:24,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:30:24,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:30:24,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:30:24,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:30:24,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:30:24,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:30:24,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:30:24,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:30:24,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:30:24,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:30:24,656 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 14:30:24,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:30:24,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:30:24,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:30:24,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:30:24,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:30:24,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:30:24,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:30:24,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:30:24,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:30:24,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:30:24,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:30:24,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:30:24,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:24,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:30:24,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:30:24,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:30:24,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:30:25,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:30:25,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:30:25,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:30:25,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:30:25,190 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:30:25,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2020-10-27 14:30:25,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d07e7337/4d56cb061f49467ea8c8d7795547c1e3/FLAGb1951b3a1 [2020-10-27 14:30:25,924 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:30:25,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2020-10-27 14:30:25,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d07e7337/4d56cb061f49467ea8c8d7795547c1e3/FLAGb1951b3a1 [2020-10-27 14:30:26,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d07e7337/4d56cb061f49467ea8c8d7795547c1e3 [2020-10-27 14:30:26,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:30:26,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:30:26,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:26,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:30:26,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:30:26,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddc3e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26, skipping insertion in model container [2020-10-27 14:30:26,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:30:26,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:30:26,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:26,523 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:30:26,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:26,565 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:30:26,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26 WrapperNode [2020-10-27 14:30:26,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:26,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:30:26,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:30:26,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:30:26,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... [2020-10-27 14:30:26,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:30:26,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:30:26,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:30:26,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:30:26,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:26,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:30:26,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:30:26,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:30:26,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:30:26,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:30:26,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:30:26,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:30:26,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:30:26,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:30:26,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:30:26,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:30:26,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:30:26,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:30:26,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:30:26,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:30:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:30:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:30:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:30:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:30:26,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:30:27,316 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:30:27,317 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 14:30:27,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:27 BoogieIcfgContainer [2020-10-27 14:30:27,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:30:27,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:30:27,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:30:27,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:30:27,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:30:26" (1/3) ... [2020-10-27 14:30:27,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699c6432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:27, skipping insertion in model container [2020-10-27 14:30:27,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:26" (2/3) ... [2020-10-27 14:30:27,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699c6432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:27, skipping insertion in model container [2020-10-27 14:30:27,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:27" (3/3) ... [2020-10-27 14:30:27,333 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2020-10-27 14:30:27,348 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:30:27,353 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:30:27,368 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:30:27,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:30:27,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:30:27,416 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:30:27,416 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:30:27,416 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:30:27,416 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:30:27,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:30:27,417 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:30:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 14:30:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:30:27,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:27,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:27,452 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1293071188, now seen corresponding path program 1 times [2020-10-27 14:30:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:27,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427924711] [2020-10-27 14:30:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:27,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:28,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:30:28,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:30:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-27 14:30:28,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:28,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:30:28,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:30:28,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:30:28,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:28,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:28,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:28,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 14:30:28,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:28,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:28,488 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 14:30:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427924711] [2020-10-27 14:30:28,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:28,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:30:28,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431310441] [2020-10-27 14:30:28,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:30:28,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:28,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:30:28,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:30:28,523 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-27 14:30:28,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:28,676 INFO L93 Difference]: Finished difference Result 67 states and 95 transitions. [2020-10-27 14:30:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:30:28,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 14:30:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:28,687 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:30:28,687 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:30:28,692 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 14:30:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:30:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-27 14:30:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 14:30:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-27 14:30:28,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-27 14:30:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:28,740 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-27 14:30:28,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:30:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-27 14:30:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:30:28,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:28,742 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, 1] [2020-10-27 14:30:28,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:30:28,742 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:28,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1341339443, now seen corresponding path program 1 times [2020-10-27 14:30:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:28,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853241337] [2020-10-27 14:30:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:28,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:31,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:30:31,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:30:31,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2554 [2020-10-27 14:30:31,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:31,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:30:31,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:30:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:30:31,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:31,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:31,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:31,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:30:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:31,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:31,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:30:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853241337] [2020-10-27 14:30:31,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:31,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:30:31,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712143433] [2020-10-27 14:30:31,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:30:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:30:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:30:31,402 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-27 14:30:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:31,528 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-10-27 14:30:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:30:31,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:30:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:31,531 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:30:31,531 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 14:30:31,532 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 14:30:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 14:30:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-27 14:30:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:30:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-27 14:30:31,541 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2020-10-27 14:30:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:31,542 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-27 14:30:31,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:30:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-27 14:30:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 14:30:31,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:31,543 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:31,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:30:31,544 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash -502200601, now seen corresponding path program 2 times [2020-10-27 14:30:31,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:31,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335541449] [2020-10-27 14:30:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:31,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:32,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:32,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:35,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:36,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 14:30:36,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:30:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:30:36,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:30:36,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:30:36,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:36,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:36,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:36,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:36,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:30:36,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:36,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:36,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:30:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335541449] [2020-10-27 14:30:36,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:36,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:30:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024112461] [2020-10-27 14:30:36,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:36,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:36,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:36,672 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-10-27 14:30:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:36,868 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-27 14:30:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:36,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-27 14:30:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:36,873 INFO L225 Difference]: With dead ends: 67 [2020-10-27 14:30:36,873 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:30:36,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:30:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-27 14:30:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:30:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-27 14:30:36,890 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 30 [2020-10-27 14:30:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:36,890 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-27 14:30:36,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-27 14:30:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 14:30:36,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:36,894 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:36,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:30:36,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2029653261, now seen corresponding path program 3 times [2020-10-27 14:30:36,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:36,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103838491] [2020-10-27 14:30:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:36,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:36,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:37,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:41,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:41,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 14:30:41,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:30:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:30:41,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:30:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:30:41,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:30:41,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:30:41,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:42,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:42,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:42,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:42,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:42,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:42,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:42,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:42,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:30:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:30:42,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103838491] [2020-10-27 14:30:42,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:42,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:30:42,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272022573] [2020-10-27 14:30:42,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:30:42,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:30:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:42,025 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 7 states. [2020-10-27 14:30:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:42,179 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2020-10-27 14:30:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:42,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-27 14:30:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:42,181 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:30:42,181 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 14:30:42,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:30:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 14:30:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-27 14:30:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:30:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-27 14:30:42,191 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 36 [2020-10-27 14:30:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:42,191 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-27 14:30:42,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:30:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-27 14:30:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 14:30:42,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:42,193 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:42,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:30:42,194 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -392241241, now seen corresponding path program 4 times [2020-10-27 14:30:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:42,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509672596] [2020-10-27 14:30:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:42,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:45,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:47,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 14:30:47,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:30:47,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:30:47,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:30:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:30:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:30:47,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:47,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:47,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:47,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:47,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:47,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:47,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 14:30:47,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509672596] [2020-10-27 14:30:47,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:47,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:30:47,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487789070] [2020-10-27 14:30:47,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:30:47,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:30:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:47,327 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 8 states. [2020-10-27 14:30:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:47,509 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2020-10-27 14:30:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:30:47,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-27 14:30:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:47,510 INFO L225 Difference]: With dead ends: 85 [2020-10-27 14:30:47,510 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:30:47,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:30:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2020-10-27 14:30:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 14:30:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2020-10-27 14:30:47,528 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 42 [2020-10-27 14:30:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:47,528 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2020-10-27 14:30:47,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:30:47,529 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2020-10-27 14:30:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:30:47,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:47,530 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:47,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:30:47,531 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:47,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1087291059, now seen corresponding path program 5 times [2020-10-27 14:30:47,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:47,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702743570] [2020-10-27 14:30:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:48,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:52,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:30:52,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:30:52,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:30:52,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:30:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:30:52,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:30:52,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:52,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:52,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:52,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:52,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:30:52,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:52,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:52,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:52,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-27 14:30:52,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702743570] [2020-10-27 14:30:52,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:52,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:30:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182155078] [2020-10-27 14:30:52,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:30:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:30:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:30:52,658 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 9 states. [2020-10-27 14:30:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:52,817 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2020-10-27 14:30:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:30:52,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-27 14:30:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:52,819 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:30:52,819 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 14:30:52,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:30:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 14:30:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-27 14:30:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 14:30:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2020-10-27 14:30:52,828 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 48 [2020-10-27 14:30:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:52,828 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2020-10-27 14:30:52,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:30:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2020-10-27 14:30:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 14:30:52,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:52,830 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:52,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:30:52,830 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1119701095, now seen corresponding path program 6 times [2020-10-27 14:30:52,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:52,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51549061] [2020-10-27 14:30:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:53,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:54,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:55,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:56,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:57,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:57,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 14:30:57,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:30:57,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:30:57,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:30:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:30:57,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:30:57,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:57,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:57,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:57,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:57,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:57,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:57,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:30:57,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:57,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:57,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-27 14:30:57,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51549061] [2020-10-27 14:30:57,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:57,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:30:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717076297] [2020-10-27 14:30:57,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:30:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:30:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:30:57,989 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand 10 states. [2020-10-27 14:30:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:58,208 INFO L93 Difference]: Finished difference Result 103 states and 131 transitions. [2020-10-27 14:30:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:30:58,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 14:30:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:58,210 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:30:58,210 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:30:58,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:30:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:30:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-10-27 14:30:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-27 14:30:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-27 14:30:58,227 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 54 [2020-10-27 14:30:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:58,228 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-27 14:30:58,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:30:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-27 14:30:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:30:58,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:58,231 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:58,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:30:58,232 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:58,232 INFO L82 PathProgramCache]: Analyzing trace with hash 860775821, now seen corresponding path program 7 times [2020-10-27 14:30:58,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:58,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254793933] [2020-10-27 14:30:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:58,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:02,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:03,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:31:03,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:31:03,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:03,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:31:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:31:03,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:03,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:03,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:03,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:03,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:31:03,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:03,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:03,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:03,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:03,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 14:31:03,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254793933] [2020-10-27 14:31:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:03,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:31:03,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716693517] [2020-10-27 14:31:03,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:31:03,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:31:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:03,557 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 11 states. [2020-10-27 14:31:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:03,852 INFO L93 Difference]: Finished difference Result 141 states and 179 transitions. [2020-10-27 14:31:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:31:03,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-27 14:31:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:03,856 INFO L225 Difference]: With dead ends: 141 [2020-10-27 14:31:03,856 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:31:03,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:31:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:31:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2020-10-27 14:31:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:31:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-10-27 14:31:03,870 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 60 [2020-10-27 14:31:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:03,870 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-10-27 14:31:03,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:31:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-10-27 14:31:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:31:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:03,872 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:03,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:31:03,872 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 922815435, now seen corresponding path program 1 times [2020-10-27 14:31:03,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:03,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615723732] [2020-10-27 14:31:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:04,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:05,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:08,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:08,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:31:08,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:31:08,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:31:08,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:08,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:31:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:08,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:31:08,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:09,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:09,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:09,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:09,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:09,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:09,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-27 14:31:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615723732] [2020-10-27 14:31:09,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:09,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:31:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947783861] [2020-10-27 14:31:09,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:31:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:31:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:09,180 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 13 states. [2020-10-27 14:31:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:09,661 INFO L93 Difference]: Finished difference Result 178 states and 227 transitions. [2020-10-27 14:31:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:31:09,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-27 14:31:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:09,663 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:31:09,663 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:31:09,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:31:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:31:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2020-10-27 14:31:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:31:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 169 transitions. [2020-10-27 14:31:09,678 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 169 transitions. Word has length 60 [2020-10-27 14:31:09,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:09,678 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 169 transitions. [2020-10-27 14:31:09,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:31:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 169 transitions. [2020-10-27 14:31:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:31:09,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:09,680 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:09,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:31:09,681 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:09,681 INFO L82 PathProgramCache]: Analyzing trace with hash -882622899, now seen corresponding path program 2 times [2020-10-27 14:31:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:09,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593344147] [2020-10-27 14:31:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:09,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:10,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:11,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:14,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:14,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:31:14,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:31:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:14,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:31:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:14,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:31:14,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:14,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:14,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:14,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:14,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:14,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:14,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:14,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:14,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:14,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 14:31:14,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593344147] [2020-10-27 14:31:14,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:14,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:31:14,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320869474] [2020-10-27 14:31:14,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:31:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:14,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:31:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:31:14,970 INFO L87 Difference]: Start difference. First operand 132 states and 169 transitions. Second operand 9 states. [2020-10-27 14:31:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:15,249 INFO L93 Difference]: Finished difference Result 291 states and 372 transitions. [2020-10-27 14:31:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:31:15,250 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-27 14:31:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:15,252 INFO L225 Difference]: With dead ends: 291 [2020-10-27 14:31:15,252 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:31:15,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:31:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 209. [2020-10-27 14:31:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-27 14:31:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 269 transitions. [2020-10-27 14:31:15,287 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 269 transitions. Word has length 60 [2020-10-27 14:31:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:15,287 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 269 transitions. [2020-10-27 14:31:15,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:31:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 269 transitions. [2020-10-27 14:31:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:31:15,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:15,290 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:15,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:31:15,290 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash 503580495, now seen corresponding path program 3 times [2020-10-27 14:31:15,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:15,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584407257] [2020-10-27 14:31:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:15,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:15,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:15,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:16,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:20,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:20,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:31:20,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:31:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:31:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:31:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:20,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:31:20,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:20,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:20,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:20,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:20,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:20,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:20,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:20,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:20,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:20,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:20,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:20,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:31:20,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584407257] [2020-10-27 14:31:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:31:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246161823] [2020-10-27 14:31:20,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:31:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:31:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:31:20,751 INFO L87 Difference]: Start difference. First operand 209 states and 269 transitions. Second operand 19 states. [2020-10-27 14:31:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:21,887 INFO L93 Difference]: Finished difference Result 328 states and 419 transitions. [2020-10-27 14:31:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:31:21,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 60 [2020-10-27 14:31:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:21,892 INFO L225 Difference]: With dead ends: 328 [2020-10-27 14:31:21,892 INFO L226 Difference]: Without dead ends: 310 [2020-10-27 14:31:21,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:31:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-27 14:31:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 300. [2020-10-27 14:31:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-10-27 14:31:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 385 transitions. [2020-10-27 14:31:21,918 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 385 transitions. Word has length 60 [2020-10-27 14:31:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 385 transitions. [2020-10-27 14:31:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:31:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 385 transitions. [2020-10-27 14:31:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:31:21,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:21,920 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:21,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:31:21,921 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -507536755, now seen corresponding path program 4 times [2020-10-27 14:31:21,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:21,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093105575] [2020-10-27 14:31:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:21,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:26,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:26,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:31:26,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:31:26,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:31:26,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:31:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:31:26,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:31:26,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:27,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:27,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:27,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 13 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:31:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093105575] [2020-10-27 14:31:27,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:27,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:31:27,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869473477] [2020-10-27 14:31:27,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:31:27,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:31:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:31:27,394 INFO L87 Difference]: Start difference. First operand 300 states and 385 transitions. Second operand 20 states. [2020-10-27 14:31:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:28,632 INFO L93 Difference]: Finished difference Result 526 states and 684 transitions. [2020-10-27 14:31:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:31:28,633 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-27 14:31:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:28,637 INFO L225 Difference]: With dead ends: 526 [2020-10-27 14:31:28,637 INFO L226 Difference]: Without dead ends: 510 [2020-10-27 14:31:28,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:31:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-10-27 14:31:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 469. [2020-10-27 14:31:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 14:31:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 621 transitions. [2020-10-27 14:31:28,664 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 621 transitions. Word has length 60 [2020-10-27 14:31:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:28,665 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 621 transitions. [2020-10-27 14:31:28,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:31:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 621 transitions. [2020-10-27 14:31:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:31:28,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:28,667 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:28,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:31:28,667 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:28,668 INFO L82 PathProgramCache]: Analyzing trace with hash 193527823, now seen corresponding path program 5 times [2020-10-27 14:31:28,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:28,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255309739] [2020-10-27 14:31:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:28,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:28,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:31,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:31,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:32,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:33,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:33,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:33,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 14:31:33,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:31:33,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:31:33,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:33,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:31:33,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:31:33,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:31:33,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:33,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:33,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:33,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:33,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:33,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:31:33,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:33,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:33,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:33,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:33,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 14:31:33,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255309739] [2020-10-27 14:31:33,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:33,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:31:33,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017804106] [2020-10-27 14:31:33,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:31:33,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:31:33,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:33,804 INFO L87 Difference]: Start difference. First operand 469 states and 621 transitions. Second operand 11 states. [2020-10-27 14:31:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:34,093 INFO L93 Difference]: Finished difference Result 827 states and 1086 transitions. [2020-10-27 14:31:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:31:34,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-27 14:31:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:34,099 INFO L225 Difference]: With dead ends: 827 [2020-10-27 14:31:34,100 INFO L226 Difference]: Without dead ends: 602 [2020-10-27 14:31:34,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:31:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-27 14:31:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 536. [2020-10-27 14:31:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-10-27 14:31:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 689 transitions. [2020-10-27 14:31:34,153 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 689 transitions. Word has length 60 [2020-10-27 14:31:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:34,153 INFO L481 AbstractCegarLoop]: Abstraction has 536 states and 689 transitions. [2020-10-27 14:31:34,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:31:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 689 transitions. [2020-10-27 14:31:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:31:34,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:34,166 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:34,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:31:34,166 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash 630647847, now seen corresponding path program 6 times [2020-10-27 14:31:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:34,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187299390] [2020-10-27 14:31:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:35,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:36,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:37,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:37,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:38,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:38,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:39,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:39,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 14:31:39,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:31:39,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:31:39,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:31:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:31:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:31:39,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:39,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:39,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:39,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:39,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:39,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:39,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:31:39,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:39,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:39,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-27 14:31:39,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187299390] [2020-10-27 14:31:39,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:39,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:31:39,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136673657] [2020-10-27 14:31:39,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:31:39,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:31:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:31:39,333 INFO L87 Difference]: Start difference. First operand 536 states and 689 transitions. Second operand 12 states. [2020-10-27 14:31:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:39,654 INFO L93 Difference]: Finished difference Result 929 states and 1222 transitions. [2020-10-27 14:31:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:31:39,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-27 14:31:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:39,662 INFO L225 Difference]: With dead ends: 929 [2020-10-27 14:31:39,662 INFO L226 Difference]: Without dead ends: 701 [2020-10-27 14:31:39,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:31:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2020-10-27 14:31:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 635. [2020-10-27 14:31:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-27 14:31:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 821 transitions. [2020-10-27 14:31:39,712 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 821 transitions. Word has length 66 [2020-10-27 14:31:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:39,713 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 821 transitions. [2020-10-27 14:31:39,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:31:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 821 transitions. [2020-10-27 14:31:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:31:39,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:39,717 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:39,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:31:39,717 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1759702733, now seen corresponding path program 7 times [2020-10-27 14:31:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:39,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811446833] [2020-10-27 14:31:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:39,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:39,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:40,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:42,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:42,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:43,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:43,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:44,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:44,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:44,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:31:44,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:31:44,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:31:44,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:31:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:31:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:31:44,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:44,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:44,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:44,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:44,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:44,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:44,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:44,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-27 14:31:44,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811446833] [2020-10-27 14:31:44,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:44,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:31:44,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531605104] [2020-10-27 14:31:44,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:31:44,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:31:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:44,904 INFO L87 Difference]: Start difference. First operand 635 states and 821 transitions. Second operand 13 states. [2020-10-27 14:31:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:45,151 INFO L93 Difference]: Finished difference Result 1031 states and 1358 transitions. [2020-10-27 14:31:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:31:45,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-27 14:31:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:45,156 INFO L225 Difference]: With dead ends: 1031 [2020-10-27 14:31:45,156 INFO L226 Difference]: Without dead ends: 800 [2020-10-27 14:31:45,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:31:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2020-10-27 14:31:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 734. [2020-10-27 14:31:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-27 14:31:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 953 transitions. [2020-10-27 14:31:45,191 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 953 transitions. Word has length 72 [2020-10-27 14:31:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:45,191 INFO L481 AbstractCegarLoop]: Abstraction has 734 states and 953 transitions. [2020-10-27 14:31:45,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:31:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 953 transitions. [2020-10-27 14:31:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:31:45,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:45,194 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:45,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:31:45,194 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:45,195 INFO L82 PathProgramCache]: Analyzing trace with hash 945173735, now seen corresponding path program 8 times [2020-10-27 14:31:45,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:45,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449006205] [2020-10-27 14:31:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:45,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:45,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:46,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:47,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:47,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:48,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:49,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 14:31:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:31:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:31:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:31:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:31:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:50,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:50,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:31:50,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:50,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-27 14:31:50,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449006205] [2020-10-27 14:31:50,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:50,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:31:50,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127214033] [2020-10-27 14:31:50,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:31:50,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:31:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:31:50,394 INFO L87 Difference]: Start difference. First operand 734 states and 953 transitions. Second operand 14 states. [2020-10-27 14:31:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:50,642 INFO L93 Difference]: Finished difference Result 1133 states and 1494 transitions. [2020-10-27 14:31:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:31:50,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-10-27 14:31:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:50,647 INFO L225 Difference]: With dead ends: 1133 [2020-10-27 14:31:50,648 INFO L226 Difference]: Without dead ends: 899 [2020-10-27 14:31:50,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:31:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-27 14:31:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 833. [2020-10-27 14:31:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 833 states. [2020-10-27 14:31:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1085 transitions. [2020-10-27 14:31:50,681 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1085 transitions. Word has length 78 [2020-10-27 14:31:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:50,681 INFO L481 AbstractCegarLoop]: Abstraction has 833 states and 1085 transitions. [2020-10-27 14:31:50,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:31:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1085 transitions. [2020-10-27 14:31:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:31:50,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:50,684 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:50,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:31:50,685 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:50,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1140077325, now seen corresponding path program 9 times [2020-10-27 14:31:50,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:50,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843568535] [2020-10-27 14:31:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:50,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:50,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:55,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:55,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 14:31:55,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:31:55,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:31:55,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:55,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:31:55,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:31:55,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:31:55,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:55,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:31:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:55,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:55,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:31:55,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:31:55,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:31:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-27 14:31:55,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843568535] [2020-10-27 14:31:55,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:31:55,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:31:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688534357] [2020-10-27 14:31:55,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:31:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:31:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:31:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:31:55,866 INFO L87 Difference]: Start difference. First operand 833 states and 1085 transitions. Second operand 10 states. [2020-10-27 14:31:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:31:56,179 INFO L93 Difference]: Finished difference Result 1162 states and 1457 transitions. [2020-10-27 14:31:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:31:56,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-27 14:31:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:31:56,187 INFO L225 Difference]: With dead ends: 1162 [2020-10-27 14:31:56,187 INFO L226 Difference]: Without dead ends: 1149 [2020-10-27 14:31:56,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:31:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-10-27 14:31:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 984. [2020-10-27 14:31:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-10-27 14:31:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1277 transitions. [2020-10-27 14:31:56,236 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1277 transitions. Word has length 84 [2020-10-27 14:31:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:31:56,236 INFO L481 AbstractCegarLoop]: Abstraction has 984 states and 1277 transitions. [2020-10-27 14:31:56,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:31:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1277 transitions. [2020-10-27 14:31:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:31:56,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:31:56,239 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:31:56,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:31:56,240 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:31:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:31:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1841141903, now seen corresponding path program 10 times [2020-10-27 14:31:56,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:31:56,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248999801] [2020-10-27 14:31:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:31:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:31:56,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:56,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:56,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:56,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:56,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:31:57,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:01,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:32:01,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:01,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:01,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:01,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:01,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:01,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:01,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:01,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:01,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:01,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-27 14:32:01,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248999801] [2020-10-27 14:32:01,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:01,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:32:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525968255] [2020-10-27 14:32:01,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:32:01,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:32:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:32:01,465 INFO L87 Difference]: Start difference. First operand 984 states and 1277 transitions. Second operand 15 states. [2020-10-27 14:32:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:01,748 INFO L93 Difference]: Finished difference Result 1563 states and 2043 transitions. [2020-10-27 14:32:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:32:01,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-10-27 14:32:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:01,755 INFO L225 Difference]: With dead ends: 1563 [2020-10-27 14:32:01,755 INFO L226 Difference]: Without dead ends: 1207 [2020-10-27 14:32:01,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:32:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2020-10-27 14:32:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1086. [2020-10-27 14:32:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1086 states. [2020-10-27 14:32:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1413 transitions. [2020-10-27 14:32:01,801 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1413 transitions. Word has length 84 [2020-10-27 14:32:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:01,801 INFO L481 AbstractCegarLoop]: Abstraction has 1086 states and 1413 transitions. [2020-10-27 14:32:01,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:32:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1413 transitions. [2020-10-27 14:32:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:32:01,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:01,805 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:01,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:32:01,805 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash -116690135, now seen corresponding path program 11 times [2020-10-27 14:32:01,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:01,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709662094] [2020-10-27 14:32:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:01,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:04,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:04,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:05,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:06,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:06,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 14:32:06,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:32:06,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:32:06,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:32:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:32:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:32:06,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:07,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:07,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:07,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:07,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:07,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:07,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:07,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:07,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:07,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:07,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-27 14:32:07,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709662094] [2020-10-27 14:32:07,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:07,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:32:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99990052] [2020-10-27 14:32:07,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:32:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:32:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:32:07,040 INFO L87 Difference]: Start difference. First operand 1086 states and 1413 transitions. Second operand 16 states. [2020-10-27 14:32:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:07,351 INFO L93 Difference]: Finished difference Result 1671 states and 2187 transitions. [2020-10-27 14:32:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:32:07,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-10-27 14:32:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:07,359 INFO L225 Difference]: With dead ends: 1671 [2020-10-27 14:32:07,359 INFO L226 Difference]: Without dead ends: 1309 [2020-10-27 14:32:07,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:32:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2020-10-27 14:32:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1188. [2020-10-27 14:32:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1188 states. [2020-10-27 14:32:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1549 transitions. [2020-10-27 14:32:07,404 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1549 transitions. Word has length 90 [2020-10-27 14:32:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:07,405 INFO L481 AbstractCegarLoop]: Abstraction has 1188 states and 1549 transitions. [2020-10-27 14:32:07,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:32:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1549 transitions. [2020-10-27 14:32:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 14:32:07,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:07,409 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:07,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:32:07,409 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:07,410 INFO L82 PathProgramCache]: Analyzing trace with hash 442027215, now seen corresponding path program 12 times [2020-10-27 14:32:07,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:07,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566002693] [2020-10-27 14:32:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:07,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:09,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:11,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:12,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 14:32:12,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:32:12,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:32:12,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:32:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:32:12,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:32:12,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:12,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:12,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:12,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:12,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:32:12,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:12,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:12,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:12,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:12,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-27 14:32:12,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566002693] [2020-10-27 14:32:12,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:12,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:32:12,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703103598] [2020-10-27 14:32:12,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:32:12,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:32:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:32:12,654 INFO L87 Difference]: Start difference. First operand 1188 states and 1549 transitions. Second operand 17 states. [2020-10-27 14:32:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:13,022 INFO L93 Difference]: Finished difference Result 1779 states and 2331 transitions. [2020-10-27 14:32:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:32:13,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-27 14:32:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:13,031 INFO L225 Difference]: With dead ends: 1779 [2020-10-27 14:32:13,031 INFO L226 Difference]: Without dead ends: 1411 [2020-10-27 14:32:13,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:32:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2020-10-27 14:32:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1290. [2020-10-27 14:32:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1290 states. [2020-10-27 14:32:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1685 transitions. [2020-10-27 14:32:13,078 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1685 transitions. Word has length 96 [2020-10-27 14:32:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:13,079 INFO L481 AbstractCegarLoop]: Abstraction has 1290 states and 1685 transitions. [2020-10-27 14:32:13,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:32:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1685 transitions. [2020-10-27 14:32:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 14:32:13,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:13,083 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:13,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:32:13,083 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1270359063, now seen corresponding path program 13 times [2020-10-27 14:32:13,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:13,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261561662] [2020-10-27 14:32:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:13,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:13,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:14,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:15,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:18,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 14:32:18,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:32:18,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5171 [2020-10-27 14:32:18,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:32:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-27 14:32:18,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:32:18,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:18,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:18,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:18,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-27 14:32:18,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261561662] [2020-10-27 14:32:18,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:18,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:32:18,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066662236] [2020-10-27 14:32:18,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:32:18,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:18,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:32:18,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:32:18,538 INFO L87 Difference]: Start difference. First operand 1290 states and 1685 transitions. Second operand 18 states. [2020-10-27 14:32:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:18,870 INFO L93 Difference]: Finished difference Result 1887 states and 2475 transitions. [2020-10-27 14:32:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:32:18,870 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2020-10-27 14:32:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:18,878 INFO L225 Difference]: With dead ends: 1887 [2020-10-27 14:32:18,878 INFO L226 Difference]: Without dead ends: 1513 [2020-10-27 14:32:18,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:32:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2020-10-27 14:32:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1392. [2020-10-27 14:32:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1392 states. [2020-10-27 14:32:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1821 transitions. [2020-10-27 14:32:18,924 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1821 transitions. Word has length 102 [2020-10-27 14:32:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:18,924 INFO L481 AbstractCegarLoop]: Abstraction has 1392 states and 1821 transitions. [2020-10-27 14:32:18,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:32:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1821 transitions. [2020-10-27 14:32:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 14:32:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:18,929 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:18,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:32:18,929 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 958001423, now seen corresponding path program 14 times [2020-10-27 14:32:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:18,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277457778] [2020-10-27 14:32:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:18,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:19,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:19,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:22,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:23,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:23,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 14:32:23,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:32:23,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:32:23,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:32:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 14:32:23,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:24,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:24,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:24,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 173 proven. 385 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 14:32:24,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277457778] [2020-10-27 14:32:24,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:24,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:32:24,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786853169] [2020-10-27 14:32:24,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:32:24,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:24,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:32:24,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:32:24,657 INFO L87 Difference]: Start difference. First operand 1392 states and 1821 transitions. Second operand 25 states. [2020-10-27 14:32:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:26,341 INFO L93 Difference]: Finished difference Result 2064 states and 2694 transitions. [2020-10-27 14:32:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:32:26,343 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 108 [2020-10-27 14:32:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:26,352 INFO L225 Difference]: With dead ends: 2064 [2020-10-27 14:32:26,352 INFO L226 Difference]: Without dead ends: 2011 [2020-10-27 14:32:26,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:32:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2020-10-27 14:32:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1966. [2020-10-27 14:32:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1966 states. [2020-10-27 14:32:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2565 transitions. [2020-10-27 14:32:26,412 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2565 transitions. Word has length 108 [2020-10-27 14:32:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:26,413 INFO L481 AbstractCegarLoop]: Abstraction has 1966 states and 2565 transitions. [2020-10-27 14:32:26,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:32:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2565 transitions. [2020-10-27 14:32:26,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 14:32:26,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:26,418 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:26,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:32:26,419 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1950762479, now seen corresponding path program 15 times [2020-10-27 14:32:26,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:26,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358926947] [2020-10-27 14:32:26,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:26,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:26,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:31,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:32:31,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:31,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:32,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 176 proven. 344 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-27 14:32:32,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358926947] [2020-10-27 14:32:32,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:32,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:32:32,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420785350] [2020-10-27 14:32:32,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:32:32,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:32:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:32:32,027 INFO L87 Difference]: Start difference. First operand 1966 states and 2565 transitions. Second operand 23 states. [2020-10-27 14:32:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:33,499 INFO L93 Difference]: Finished difference Result 3272 states and 4260 transitions. [2020-10-27 14:32:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:32:33,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-10-27 14:32:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:33,516 INFO L225 Difference]: With dead ends: 3272 [2020-10-27 14:32:33,517 INFO L226 Difference]: Without dead ends: 3207 [2020-10-27 14:32:33,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:32:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2020-10-27 14:32:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 3150. [2020-10-27 14:32:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3150 states. [2020-10-27 14:32:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 4101 transitions. [2020-10-27 14:32:33,629 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 4101 transitions. Word has length 108 [2020-10-27 14:32:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:33,629 INFO L481 AbstractCegarLoop]: Abstraction has 3150 states and 4101 transitions. [2020-10-27 14:32:33,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:32:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 4101 transitions. [2020-10-27 14:32:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 14:32:33,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:33,638 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:33,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:32:33,638 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:33,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1676002865, now seen corresponding path program 16 times [2020-10-27 14:32:33,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:33,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701968124] [2020-10-27 14:32:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:33,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:33,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:33,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:34,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:38,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:38,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 14:32:38,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:32:38,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:32:38,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:32:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:38,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:32:38,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:38,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:38,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:38,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:38,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:38,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:38,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:38,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:38,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-27 14:32:38,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701968124] [2020-10-27 14:32:38,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:38,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:32:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350457893] [2020-10-27 14:32:38,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:32:38,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:38,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:32:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:32:38,933 INFO L87 Difference]: Start difference. First operand 3150 states and 4101 transitions. Second operand 19 states. [2020-10-27 14:32:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:39,315 INFO L93 Difference]: Finished difference Result 4791 states and 6251 transitions. [2020-10-27 14:32:39,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:32:39,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 108 [2020-10-27 14:32:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:39,335 INFO L225 Difference]: With dead ends: 4791 [2020-10-27 14:32:39,335 INFO L226 Difference]: Without dead ends: 3757 [2020-10-27 14:32:39,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:32:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2020-10-27 14:32:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3396. [2020-10-27 14:32:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3396 states. [2020-10-27 14:32:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4429 transitions. [2020-10-27 14:32:39,435 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4429 transitions. Word has length 108 [2020-10-27 14:32:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:39,435 INFO L481 AbstractCegarLoop]: Abstraction has 3396 states and 4429 transitions. [2020-10-27 14:32:39,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:32:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4429 transitions. [2020-10-27 14:32:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 14:32:39,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:39,444 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:39,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:32:39,446 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:39,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:39,446 INFO L82 PathProgramCache]: Analyzing trace with hash 789238761, now seen corresponding path program 17 times [2020-10-27 14:32:39,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:39,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648866828] [2020-10-27 14:32:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:39,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:40,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:40,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:44,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:44,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 14:32:44,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:32:44,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:32:44,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:44,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:32:44,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:44,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 14:32:44,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:45,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:45,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:45,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:45,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:45,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:45,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:45,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:45,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:45,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:45,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:45,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 193 proven. 457 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-27 14:32:45,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648866828] [2020-10-27 14:32:45,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:45,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:32:45,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281485362] [2020-10-27 14:32:45,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:32:45,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:32:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:32:45,241 INFO L87 Difference]: Start difference. First operand 3396 states and 4429 transitions. Second operand 27 states. [2020-10-27 14:32:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:47,478 INFO L93 Difference]: Finished difference Result 5784 states and 7526 transitions. [2020-10-27 14:32:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:32:47,478 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 114 [2020-10-27 14:32:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:47,499 INFO L225 Difference]: With dead ends: 5784 [2020-10-27 14:32:47,499 INFO L226 Difference]: Without dead ends: 5731 [2020-10-27 14:32:47,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:32:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2020-10-27 14:32:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5686. [2020-10-27 14:32:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5686 states. [2020-10-27 14:32:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 7397 transitions. [2020-10-27 14:32:47,654 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 7397 transitions. Word has length 114 [2020-10-27 14:32:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:47,655 INFO L481 AbstractCegarLoop]: Abstraction has 5686 states and 7397 transitions. [2020-10-27 14:32:47,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:32:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 7397 transitions. [2020-10-27 14:32:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 14:32:47,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:47,668 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:47,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:32:47,669 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2119525141, now seen corresponding path program 18 times [2020-10-27 14:32:47,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:47,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288951160] [2020-10-27 14:32:47,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:47,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:47,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:47,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:48,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:49,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:52,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:32:52,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:53,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:53,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:53,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:53,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:53,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:53,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:53,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:53,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 163 proven. 237 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-10-27 14:32:53,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288951160] [2020-10-27 14:32:53,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:53,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:32:53,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627964263] [2020-10-27 14:32:53,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:32:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:32:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:32:53,057 INFO L87 Difference]: Start difference. First operand 5686 states and 7397 transitions. Second operand 17 states. [2020-10-27 14:32:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:32:53,996 INFO L93 Difference]: Finished difference Result 11578 states and 15038 transitions. [2020-10-27 14:32:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:32:53,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2020-10-27 14:32:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:32:54,027 INFO L225 Difference]: With dead ends: 11578 [2020-10-27 14:32:54,027 INFO L226 Difference]: Without dead ends: 11288 [2020-10-27 14:32:54,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:32:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11288 states. [2020-10-27 14:32:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11288 to 11006. [2020-10-27 14:32:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11006 states. [2020-10-27 14:32:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11006 states to 11006 states and 14309 transitions. [2020-10-27 14:32:54,320 INFO L78 Accepts]: Start accepts. Automaton has 11006 states and 14309 transitions. Word has length 114 [2020-10-27 14:32:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:32:54,321 INFO L481 AbstractCegarLoop]: Abstraction has 11006 states and 14309 transitions. [2020-10-27 14:32:54,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:32:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 11006 states and 14309 transitions. [2020-10-27 14:32:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 14:32:54,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:32:54,347 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:32:54,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:32:54,348 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:32:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:32:54,351 INFO L82 PathProgramCache]: Analyzing trace with hash 126054313, now seen corresponding path program 19 times [2020-10-27 14:32:54,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:32:54,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338910873] [2020-10-27 14:32:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:32:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:54,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:54,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:54,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:54,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:58,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:59,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:32:59,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:59,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:32:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:32:59,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:32:59,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:32:59,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:32:59,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:32:59,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:32:59,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:32:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:32:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:32:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:32:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:32:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 193 proven. 325 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-27 14:32:59,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338910873] [2020-10-27 14:32:59,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:32:59,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:32:59,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30147749] [2020-10-27 14:32:59,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:32:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:32:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:32:59,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:32:59,879 INFO L87 Difference]: Start difference. First operand 11006 states and 14309 transitions. Second operand 21 states. [2020-10-27 14:33:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:01,409 INFO L93 Difference]: Finished difference Result 20408 states and 26488 transitions. [2020-10-27 14:33:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:33:01,410 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 114 [2020-10-27 14:33:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:01,447 INFO L225 Difference]: With dead ends: 20408 [2020-10-27 14:33:01,448 INFO L226 Difference]: Without dead ends: 20271 [2020-10-27 14:33:01,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:33:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20271 states. [2020-10-27 14:33:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20271 to 19397. [2020-10-27 14:33:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19397 states. [2020-10-27 14:33:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19397 states to 19397 states and 25177 transitions. [2020-10-27 14:33:01,945 INFO L78 Accepts]: Start accepts. Automaton has 19397 states and 25177 transitions. Word has length 114 [2020-10-27 14:33:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:01,946 INFO L481 AbstractCegarLoop]: Abstraction has 19397 states and 25177 transitions. [2020-10-27 14:33:01,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:33:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 19397 states and 25177 transitions. [2020-10-27 14:33:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 14:33:01,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:01,994 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:01,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:33:01,994 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash -903304985, now seen corresponding path program 20 times [2020-10-27 14:33:01,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:01,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618179498] [2020-10-27 14:33:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:33:07,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:07,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:07,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:07,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:07,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:07,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:07,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:07,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:07,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-10-27 14:33:07,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618179498] [2020-10-27 14:33:07,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:33:07,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:33:07,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081688537] [2020-10-27 14:33:07,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:33:07,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:33:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:33:07,062 INFO L87 Difference]: Start difference. First operand 19397 states and 25177 transitions. Second operand 4 states. [2020-10-27 14:33:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:07,739 INFO L93 Difference]: Finished difference Result 38788 states and 50348 transitions. [2020-10-27 14:33:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:33:07,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-27 14:33:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:07,778 INFO L225 Difference]: With dead ends: 38788 [2020-10-27 14:33:07,779 INFO L226 Difference]: Without dead ends: 19399 [2020-10-27 14:33:07,810 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 14:33:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19399 states. [2020-10-27 14:33:08,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19399 to 19398. [2020-10-27 14:33:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19398 states. [2020-10-27 14:33:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19398 states to 19398 states and 25178 transitions. [2020-10-27 14:33:08,286 INFO L78 Accepts]: Start accepts. Automaton has 19398 states and 25178 transitions. Word has length 114 [2020-10-27 14:33:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:08,287 INFO L481 AbstractCegarLoop]: Abstraction has 19398 states and 25178 transitions. [2020-10-27 14:33:08,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:33:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 19398 states and 25178 transitions. [2020-10-27 14:33:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 14:33:08,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:08,325 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:08,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:33:08,326 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1952330313, now seen corresponding path program 1 times [2020-10-27 14:33:08,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:08,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300700892] [2020-10-27 14:33:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:08,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:08,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:09,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:14,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 14:33:14,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:14,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5764 [2020-10-27 14:33:14,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:33:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 14:33:14,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:33:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:14,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:14,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:14,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-27 14:33:14,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300700892] [2020-10-27 14:33:14,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:14,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:33:14,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481541613] [2020-10-27 14:33:14,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:33:14,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:14,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:33:14,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:33:14,438 INFO L87 Difference]: Start difference. First operand 19398 states and 25178 transitions. Second operand 20 states. [2020-10-27 14:33:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:15,028 INFO L93 Difference]: Finished difference Result 30078 states and 39076 transitions. [2020-10-27 14:33:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:33:15,028 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 116 [2020-10-27 14:33:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:15,073 INFO L225 Difference]: With dead ends: 30078 [2020-10-27 14:33:15,073 INFO L226 Difference]: Without dead ends: 23509 [2020-10-27 14:33:15,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:33:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23509 states. [2020-10-27 14:33:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23509 to 20940. [2020-10-27 14:33:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20940 states. [2020-10-27 14:33:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20940 states to 20940 states and 27234 transitions. [2020-10-27 14:33:15,609 INFO L78 Accepts]: Start accepts. Automaton has 20940 states and 27234 transitions. Word has length 116 [2020-10-27 14:33:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:15,609 INFO L481 AbstractCegarLoop]: Abstraction has 20940 states and 27234 transitions. [2020-10-27 14:33:15,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:33:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20940 states and 27234 transitions. [2020-10-27 14:33:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 14:33:15,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:15,636 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:15,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:33:15,636 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:15,636 INFO L82 PathProgramCache]: Analyzing trace with hash -690595789, now seen corresponding path program 2 times [2020-10-27 14:33:15,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:15,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721218155] [2020-10-27 14:33:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:15,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:15,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:17,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:18,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 14:33:20,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:21,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:21,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:21,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:21,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 198 proven. 582 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 14:33:21,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721218155] [2020-10-27 14:33:21,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:21,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:33:21,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219083516] [2020-10-27 14:33:21,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:33:21,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:33:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=868, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:33:21,639 INFO L87 Difference]: Start difference. First operand 20940 states and 27234 transitions. Second operand 31 states. [2020-10-27 14:33:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:24,829 INFO L93 Difference]: Finished difference Result 37282 states and 48339 transitions. [2020-10-27 14:33:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:33:24,830 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2020-10-27 14:33:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:24,873 INFO L225 Difference]: With dead ends: 37282 [2020-10-27 14:33:24,873 INFO L226 Difference]: Without dead ends: 37235 [2020-10-27 14:33:24,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:33:24,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37235 states. [2020-10-27 14:33:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37235 to 37196. [2020-10-27 14:33:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37196 states. [2020-10-27 14:33:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37196 states to 37196 states and 48226 transitions. [2020-10-27 14:33:25,685 INFO L78 Accepts]: Start accepts. Automaton has 37196 states and 48226 transitions. Word has length 122 [2020-10-27 14:33:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:25,686 INFO L481 AbstractCegarLoop]: Abstraction has 37196 states and 48226 transitions. [2020-10-27 14:33:25,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:33:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 37196 states and 48226 transitions. [2020-10-27 14:33:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 14:33:25,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:25,735 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:25,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:33:25,736 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash -628556175, now seen corresponding path program 3 times [2020-10-27 14:33:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:25,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035298113] [2020-10-27 14:33:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:25,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:28,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:30,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:30,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 14:33:30,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:33:30,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:33:30,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:33:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:30,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:33:30,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:31,028 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-10-27 14:33:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:32,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:32,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:32,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:32,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:32,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:32,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:32,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:32,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:32,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 177 proven. 629 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:33:32,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035298113] [2020-10-27 14:33:32,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:32,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:33:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358315685] [2020-10-27 14:33:32,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:33:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:33:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:33:32,049 INFO L87 Difference]: Start difference. First operand 37196 states and 48226 transitions. Second operand 33 states. [2020-10-27 14:33:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:36,028 INFO L93 Difference]: Finished difference Result 66716 states and 86219 transitions. [2020-10-27 14:33:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:33:36,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-10-27 14:33:36,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:36,101 INFO L225 Difference]: With dead ends: 66716 [2020-10-27 14:33:36,101 INFO L226 Difference]: Without dead ends: 66675 [2020-10-27 14:33:36,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=151, Invalid=2011, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:33:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66675 states. [2020-10-27 14:33:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66675 to 66642. [2020-10-27 14:33:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66642 states. [2020-10-27 14:33:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66642 states to 66642 states and 86122 transitions. [2020-10-27 14:33:37,897 INFO L78 Accepts]: Start accepts. Automaton has 66642 states and 86122 transitions. Word has length 122 [2020-10-27 14:33:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:37,897 INFO L481 AbstractCegarLoop]: Abstraction has 66642 states and 86122 transitions. [2020-10-27 14:33:37,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:33:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 66642 states and 86122 transitions. [2020-10-27 14:33:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 14:33:38,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:38,149 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:38,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:33:38,149 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1860972787, now seen corresponding path program 4 times [2020-10-27 14:33:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:38,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465655637] [2020-10-27 14:33:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:38,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:39,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:33:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:33:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:43,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:43,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:43,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:43,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:43,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:33:43,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:43,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:43,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 150 proven. 206 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-27 14:33:43,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465655637] [2020-10-27 14:33:43,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:43,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:33:43,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386999859] [2020-10-27 14:33:43,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:33:43,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:43,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:33:43,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:33:43,473 INFO L87 Difference]: Start difference. First operand 66642 states and 86122 transitions. Second operand 15 states. [2020-10-27 14:33:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:33:45,826 INFO L93 Difference]: Finished difference Result 136348 states and 175821 transitions. [2020-10-27 14:33:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:33:45,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-10-27 14:33:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:33:45,991 INFO L225 Difference]: With dead ends: 136348 [2020-10-27 14:33:45,991 INFO L226 Difference]: Without dead ends: 133223 [2020-10-27 14:33:46,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:33:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133223 states. [2020-10-27 14:33:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133223 to 130106. [2020-10-27 14:33:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130106 states. [2020-10-27 14:33:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130106 states to 130106 states and 168010 transitions. [2020-10-27 14:33:49,462 INFO L78 Accepts]: Start accepts. Automaton has 130106 states and 168010 transitions. Word has length 122 [2020-10-27 14:33:49,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:33:49,462 INFO L481 AbstractCegarLoop]: Abstraction has 130106 states and 168010 transitions. [2020-10-27 14:33:49,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:33:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 130106 states and 168010 transitions. [2020-10-27 14:33:49,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 14:33:49,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:33:49,612 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:33:49,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:33:49,612 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:33:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:33:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1379892529, now seen corresponding path program 5 times [2020-10-27 14:33:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:33:49,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211420921] [2020-10-27 14:33:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:33:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:49,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:54,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:54,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 14:33:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:55,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:33:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:33:55,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:33:55,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:33:55,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:33:55,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:33:55,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:33:55,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:33:55,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:33:55,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:33:55,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:33:55,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:33:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 213 proven. 535 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-10-27 14:33:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211420921] [2020-10-27 14:33:55,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:33:55,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:33:55,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736171041] [2020-10-27 14:33:55,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:33:55,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:33:55,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:33:55,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=754, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:33:55,507 INFO L87 Difference]: Start difference. First operand 130106 states and 168010 transitions. Second operand 29 states.