/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-crafted/zero_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:07:34,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:07:34,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:07:34,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:07:34,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:07:34,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:07:34,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:07:34,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:07:34,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:07:34,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:07:34,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:07:34,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:07:34,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:07:34,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:07:34,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:07:34,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:07:34,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:07:34,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:07:34,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:07:34,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:07:34,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:07:34,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:07:34,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:07:34,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:07:34,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:07:34,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:07:34,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:07:34,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:07:34,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:07:34,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:07:34,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:07:34,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:07:34,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:07:34,645 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:07:34,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:07:34,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:07:34,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:07:34,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:07:34,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:07:34,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:07:34,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:07:34,661 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 14:07:34,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:07:34,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:07:34,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:07:34,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:07:34,690 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:07:34,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:07:34,690 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:07:34,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:07:34,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:07:34,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:07:34,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:07:34,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:07:34,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:07:34,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:07:34,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:07:34,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:07:34,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:07:34,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:07:34,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:07:34,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:07:34,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:07:34,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:07:34,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:07:34,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:07:34,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:07:34,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:07:34,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:07:34,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:07:34,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:07:34,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:07:35,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:07:35,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:07:35,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:07:35,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:07:35,113 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:07:35,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-27 14:07:35,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/288ca495d/2ce95b03d4d749b59730f99ac173dadd/FLAG58b7f9952 [2020-10-27 14:07:35,808 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:07:35,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-27 14:07:35,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/288ca495d/2ce95b03d4d749b59730f99ac173dadd/FLAG58b7f9952 [2020-10-27 14:07:36,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/288ca495d/2ce95b03d4d749b59730f99ac173dadd [2020-10-27 14:07:36,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:07:36,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:07:36,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:36,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:07:36,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:07:36,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33836534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36, skipping insertion in model container [2020-10-27 14:07:36,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:07:36,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:07:36,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:36,436 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:07:36,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:07:36,507 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:07:36,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36 WrapperNode [2020-10-27 14:07:36,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:07:36,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:07:36,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:07:36,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:07:36,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (1/1) ... [2020-10-27 14:07:36,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:07:36,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:07:36,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:07:36,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:07:36,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (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 14:07:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:07:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:07:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:07:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:07:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:07:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:07:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:07:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:07:36,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:07:36,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:07:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:07:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:07:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-27 14:07:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 14:07:36,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:07:36,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 14:07:36,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:07:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:07:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:07:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:07:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:07:36,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:07:37,261 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:07:37,261 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 14:07:37,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:37 BoogieIcfgContainer [2020-10-27 14:07:37,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:07:37,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:07:37,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:07:37,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:07:37,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:07:36" (1/3) ... [2020-10-27 14:07:37,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f623aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:37, skipping insertion in model container [2020-10-27 14:07:37,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:07:36" (2/3) ... [2020-10-27 14:07:37,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f623aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:07:37, skipping insertion in model container [2020-10-27 14:07:37,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:07:37" (3/3) ... [2020-10-27 14:07:37,272 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2020-10-27 14:07:37,284 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:07:37,290 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:07:37,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:07:37,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:07:37,381 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:07:37,381 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:07:37,381 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:07:37,381 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:07:37,381 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:07:37,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:07:37,382 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:07:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 14:07:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:07:37,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:37,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:37,408 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1679398581, now seen corresponding path program 1 times [2020-10-27 14:07:37,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:37,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890279392] [2020-10-27 14:07:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:37,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:38,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:07:38,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:07:38,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-10-27 14:07:38,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:07:38,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:38,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:07:38,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:38,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:38,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:38,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:38,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:38,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 14:07:38,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:38,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:38,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:38,819 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 14:07:38,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890279392] [2020-10-27 14:07:38,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:38,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:07:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043058441] [2020-10-27 14:07:38,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:07:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:07:38,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:38,845 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-27 14:07:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:38,954 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2020-10-27 14:07:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:07:38,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-27 14:07:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:38,963 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:07:38,964 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 14:07:38,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:07:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 14:07:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 14:07:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:07:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-27 14:07:39,009 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-27 14:07:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:39,010 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-27 14:07:39,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:07:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-27 14:07:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:07:39,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:39,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:39,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:07:39,012 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash -359303743, now seen corresponding path program 1 times [2020-10-27 14:07:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:39,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417563963] [2020-10-27 14:07:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:39,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:39,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:39,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:07:39,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:07:39,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 927 [2020-10-27 14:07:39,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:39,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:39,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:07:39,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:40,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:40,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:40,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:40,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:40,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:07:40,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:40,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:40,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:40,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:40,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:40,053 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 14:07:40,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417563963] [2020-10-27 14:07:40,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:07:40,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 14:07:40,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58153145] [2020-10-27 14:07:40,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:40,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:40,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:40,063 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-10-27 14:07:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:40,346 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-27 14:07:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:07:40,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-27 14:07:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:40,348 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:07:40,348 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:07:40,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:07:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:07:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-27 14:07:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 14:07:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-27 14:07:40,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-27 14:07:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:40,372 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-27 14:07:40,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-27 14:07:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:07:40,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:40,374 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:40,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:07:40,374 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:40,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1073664907, now seen corresponding path program 1 times [2020-10-27 14:07:40,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:40,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622348494] [2020-10-27 14:07:40,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:40,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:40,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:42,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:43,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:45,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:07:45,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:07:45,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:07:45,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:07:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:45,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:07:45,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:45,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:45,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:45,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:45,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:45,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:45,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:45,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:45,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:45,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:45,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:07:45,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622348494] [2020-10-27 14:07:45,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:45,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:07:45,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855668802] [2020-10-27 14:07:45,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:07:45,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:07:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:07:45,511 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-27 14:07:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:45,635 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-27 14:07:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:07:45,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-27 14:07:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:45,637 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:07:45,637 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 14:07:45,638 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 14:07:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 14:07:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-27 14:07:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 14:07:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-27 14:07:45,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2020-10-27 14:07:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:45,646 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-27 14:07:45,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:07:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-27 14:07:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:07:45,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:45,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:45,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:07:45,648 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash 922745933, now seen corresponding path program 2 times [2020-10-27 14:07:45,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:45,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595956784] [2020-10-27 14:07:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:45,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:48,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:49,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:49,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:50,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:50,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:07:50,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:07:50,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:07:50,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:07:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:07:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:07:50,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:51,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:51,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:51,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:51,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:07:51,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:51,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:51,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:51,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:51,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:07:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595956784] [2020-10-27 14:07:51,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:51,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:07:51,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542919996] [2020-10-27 14:07:51,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:07:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:07:51,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:07:51,816 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 20 states. [2020-10-27 14:07:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:52,528 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-27 14:07:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:07:52,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 33 [2020-10-27 14:07:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:52,529 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:07:52,530 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 14:07:52,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:07:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 14:07:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 14:07:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 14:07:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-27 14:07:52,538 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2020-10-27 14:07:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:52,538 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-27 14:07:52,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:07:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-27 14:07:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:07:52,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:52,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:52,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:07:52,540 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:52,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:52,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1988983601, now seen corresponding path program 3 times [2020-10-27 14:07:52,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:52,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499000918] [2020-10-27 14:07:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:52,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:53,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:54,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:07:54,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:07:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2265 [2020-10-27 14:07:54,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:07:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:07:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:07:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:54,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:07:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:54,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:54,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:07:54,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:07:54,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:07:54,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:07:54,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:07:54,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:07:54,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:07:54,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:07:54,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:07:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:07:54,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499000918] [2020-10-27 14:07:54,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:07:54,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:07:54,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254275372] [2020-10-27 14:07:54,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:07:54,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:07:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:07:54,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:07:54,914 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-10-27 14:07:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:07:55,166 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-27 14:07:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:07:55,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 14:07:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:07:55,167 INFO L225 Difference]: With dead ends: 56 [2020-10-27 14:07:55,168 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:07:55,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:07:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:07:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 14:07:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 14:07:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-27 14:07:55,182 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 35 [2020-10-27 14:07:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:07:55,183 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-27 14:07:55,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:07:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-27 14:07:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:07:55,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:07:55,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:07:55,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:07:55,187 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:07:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:07:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 169491669, now seen corresponding path program 4 times [2020-10-27 14:07:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:07:55,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519122551] [2020-10-27 14:07:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:07:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:07:55,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:56,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:57,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:58,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:07:59,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:00,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:00,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:08:00,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:08:00,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:08:00,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:00,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:08:00,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:00,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:08:00,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:08:01,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:01,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:01,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:01,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:01,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:08:01,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:01,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:01,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:01,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519122551] [2020-10-27 14:08:01,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:01,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:08:01,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141216594] [2020-10-27 14:08:01,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:08:01,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:08:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:08:01,147 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 25 states. [2020-10-27 14:08:03,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:03,145 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2020-10-27 14:08:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:08:03,145 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-10-27 14:08:03,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:03,147 INFO L225 Difference]: With dead ends: 77 [2020-10-27 14:08:03,147 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:08:03,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:08:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:08:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-27 14:08:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:08:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-27 14:08:03,159 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-27 14:08:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:03,159 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-27 14:08:03,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:08:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-27 14:08:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:08:03,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:03,161 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:03,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:08:03,161 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:03,162 INFO L82 PathProgramCache]: Analyzing trace with hash -92060713, now seen corresponding path program 5 times [2020-10-27 14:08:03,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:03,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166121845] [2020-10-27 14:08:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:03,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:03,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:03,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:03,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:08,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:08:08,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:08,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:08:08,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:08,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:08,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:08:08,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:08:08,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:08,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:08,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:08,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:08,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:08,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:08,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:08:08,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166121845] [2020-10-27 14:08:08,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:08,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:08,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444321190] [2020-10-27 14:08:08,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:08,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:08,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:08,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:08,294 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 10 states. [2020-10-27 14:08:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:08,708 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-27 14:08:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:08,709 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 14:08:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:08,710 INFO L225 Difference]: With dead ends: 111 [2020-10-27 14:08:08,710 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:08:08,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:08:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:08:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-10-27 14:08:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:08:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-27 14:08:08,723 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 43 [2020-10-27 14:08:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:08,723 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-27 14:08:08,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-27 14:08:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:08:08,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:08,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:08,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:08:08,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1021123607, now seen corresponding path program 6 times [2020-10-27 14:08:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141885588] [2020-10-27 14:08:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:08,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:08:13,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:08:13,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:08:13,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:13,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:13,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:13,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:13,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:13,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:13,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:13,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:13,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:13,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:13,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:13,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:08:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141885588] [2020-10-27 14:08:13,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:13,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:08:13,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377504929] [2020-10-27 14:08:13,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:08:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:08:13,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:08:13,840 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 10 states. [2020-10-27 14:08:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:14,108 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-10-27 14:08:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:08:14,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-27 14:08:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:14,109 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:08:14,110 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 14:08:14,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 14:08:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-10-27 14:08:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 14:08:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-27 14:08:14,120 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2020-10-27 14:08:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:14,121 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-27 14:08:14,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:08:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-27 14:08:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:08:14,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:14,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:14,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:08:14,122 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -22589025, now seen corresponding path program 7 times [2020-10-27 14:08:14,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:14,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773327568] [2020-10-27 14:08:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:14,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:14,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:15,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:17,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:19,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:19,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:08:19,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:08:19,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-27 14:08:19,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:08:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:08:19,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:08:20,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:20,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:21,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:21,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:21,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:08:21,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773327568] [2020-10-27 14:08:21,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:21,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:08:21,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141645019] [2020-10-27 14:08:21,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:08:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:08:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:08:21,034 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 33 states. [2020-10-27 14:08:21,995 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 14:08:22,344 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 14:08:22,647 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 14:08:23,662 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-27 14:08:23,957 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 14:08:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:24,570 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-27 14:08:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:08:24,571 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 51 [2020-10-27 14:08:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:24,572 INFO L225 Difference]: With dead ends: 102 [2020-10-27 14:08:24,572 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 14:08:24,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=329, Invalid=2977, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:08:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 14:08:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2020-10-27 14:08:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:08:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-27 14:08:24,590 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 51 [2020-10-27 14:08:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:24,593 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-27 14:08:24,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:08:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-27 14:08:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:08:24,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:24,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:24,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:08:24,599 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1115170401, now seen corresponding path program 8 times [2020-10-27 14:08:24,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:24,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945559131] [2020-10-27 14:08:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:24,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:24,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:29,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:08:29,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:29,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:08:29,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:29,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:29,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:08:29,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:08:29,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:29,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:29,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:29,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:29,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:29,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:29,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:08:29,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:29,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:29,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:08:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945559131] [2020-10-27 14:08:29,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:29,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:29,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965095768] [2020-10-27 14:08:29,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:29,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:29,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:29,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:29,746 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 12 states. [2020-10-27 14:08:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:30,157 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2020-10-27 14:08:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:30,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 14:08:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:30,158 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:08:30,158 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:08:30,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:08:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:08:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-27 14:08:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-27 14:08:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-27 14:08:30,185 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 53 [2020-10-27 14:08:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:30,186 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-27 14:08:30,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-27 14:08:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:08:30,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:30,192 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:30,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:08:30,192 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1991760099, now seen corresponding path program 9 times [2020-10-27 14:08:30,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:30,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705921270] [2020-10-27 14:08:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:30,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:30,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:31,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:35,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:08:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:35,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:35,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:35,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:35,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:35,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:35,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:35,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:35,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:35,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 14:08:35,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705921270] [2020-10-27 14:08:35,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:35,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:08:35,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246717668] [2020-10-27 14:08:35,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:08:35,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:35,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:08:35,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:08:35,328 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-27 14:08:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:35,753 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-27 14:08:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:08:35,754 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-27 14:08:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:35,755 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:08:35,755 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:08:35,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:08:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:08:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-27 14:08:35,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 14:08:35,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-27 14:08:35,765 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 55 [2020-10-27 14:08:35,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:35,766 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-27 14:08:35,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:08:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-27 14:08:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:08:35,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:35,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:35,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:08:35,767 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1839353367, now seen corresponding path program 10 times [2020-10-27 14:08:35,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:35,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394902279] [2020-10-27 14:08:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:35,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:36,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:38,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:39,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:40,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:40,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:08:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:43,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:43,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:08:43,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394902279] [2020-10-27 14:08:43,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:43,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 14:08:43,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88618543] [2020-10-27 14:08:43,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 14:08:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 14:08:43,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:08:43,710 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 45 states. [2020-10-27 14:08:45,671 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-27 14:08:45,886 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-27 14:08:46,244 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-10-27 14:08:46,467 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-27 14:08:46,936 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 14:08:47,738 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-27 14:08:48,387 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-27 14:08:48,614 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 14:08:48,978 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-27 14:08:50,167 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2020-10-27 14:08:51,509 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2020-10-27 14:08:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:52,385 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-10-27 14:08:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-27 14:08:52,386 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 61 [2020-10-27 14:08:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:52,390 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:08:52,390 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 14:08:52,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=726, Invalid=7646, Unknown=0, NotChecked=0, Total=8372 [2020-10-27 14:08:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 14:08:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2020-10-27 14:08:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:08:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-27 14:08:52,411 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 61 [2020-10-27 14:08:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:52,411 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-27 14:08:52,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 14:08:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-27 14:08:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:08:52,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:52,412 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:52,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:08:52,413 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1038640085, now seen corresponding path program 11 times [2020-10-27 14:08:52,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:52,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782069878] [2020-10-27 14:08:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:52,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:52,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:52,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:57,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:08:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:08:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:57,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:57,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:08:57,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:08:57,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:08:57,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:08:57,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:08:57,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:08:57,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:08:57,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:08:57,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:08:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:08:57,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782069878] [2020-10-27 14:08:57,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:08:57,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:08:57,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980192395] [2020-10-27 14:08:57,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:08:57,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:08:57,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:08:57,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:08:57,592 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 14 states. [2020-10-27 14:08:58,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:08:58,111 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2020-10-27 14:08:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:08:58,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-27 14:08:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:08:58,114 INFO L225 Difference]: With dead ends: 200 [2020-10-27 14:08:58,114 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 14:08:58,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:08:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 14:08:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2020-10-27 14:08:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-27 14:08:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-27 14:08:58,136 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 63 [2020-10-27 14:08:58,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:08:58,136 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-27 14:08:58,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:08:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-27 14:08:58,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:08:58,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:08:58,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:08:58,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:08:58,138 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:08:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:08:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1230019371, now seen corresponding path program 12 times [2020-10-27 14:08:58,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:08:58,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524768997] [2020-10-27 14:08:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:08:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:08:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:58,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:08:59,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:03,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:03,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:09:03,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:03,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:03,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:03,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:03,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:03,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:03,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:09:03,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:03,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:03,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:03,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:03,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-27 14:09:03,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524768997] [2020-10-27 14:09:03,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:03,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:09:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591239936] [2020-10-27 14:09:03,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:09:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:09:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:09:03,344 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2020-10-27 14:09:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:04,029 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-10-27 14:09:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:09:04,030 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-27 14:09:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:04,031 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:09:04,031 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:09:04,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:09:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:09:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-27 14:09:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 14:09:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-27 14:09:04,053 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2020-10-27 14:09:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:04,053 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-27 14:09:04,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:09:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-27 14:09:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:09:04,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:04,060 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:04,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:09:04,060 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:04,060 INFO L82 PathProgramCache]: Analyzing trace with hash 585956787, now seen corresponding path program 13 times [2020-10-27 14:09:04,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:04,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613135090] [2020-10-27 14:09:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:04,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:04,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:07,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:08,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 14:09:09,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:09,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:09:09,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:12,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:12,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:09:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613135090] [2020-10-27 14:09:12,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:12,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:09:12,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087437762] [2020-10-27 14:09:12,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:09:12,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:09:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1784, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:09:12,554 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 44 states. [2020-10-27 14:09:14,339 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-27 14:09:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:16,743 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2020-10-27 14:09:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:09:16,745 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 71 [2020-10-27 14:09:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:16,747 INFO L225 Difference]: With dead ends: 120 [2020-10-27 14:09:16,747 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:09:16,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=257, Invalid=3903, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 14:09:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:09:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2020-10-27 14:09:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:09:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-27 14:09:16,772 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 71 [2020-10-27 14:09:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:16,772 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-27 14:09:16,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:09:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-27 14:09:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:09:16,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:16,773 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:16,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:09:16,774 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1797491403, now seen corresponding path program 14 times [2020-10-27 14:09:16,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:16,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916276178] [2020-10-27 14:09:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:18,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:21,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:09:21,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:21,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:21,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 14:09:21,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916276178] [2020-10-27 14:09:21,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:21,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:09:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935954833] [2020-10-27 14:09:21,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:09:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:21,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:09:21,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:09:21,969 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 16 states. [2020-10-27 14:09:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:22,826 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2020-10-27 14:09:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:09:22,827 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-27 14:09:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:22,828 INFO L225 Difference]: With dead ends: 189 [2020-10-27 14:09:22,829 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 14:09:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:09:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 14:09:22,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-10-27 14:09:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 14:09:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-27 14:09:22,847 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 73 [2020-10-27 14:09:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:22,847 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-27 14:09:22,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:09:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-27 14:09:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:09:22,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:22,848 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:22,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:09:22,848 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1812143477, now seen corresponding path program 15 times [2020-10-27 14:09:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:22,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209596017] [2020-10-27 14:09:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:22,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:22,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:27,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:09:27,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:28,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:28,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:28,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:28,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:28,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:28,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 14:09:28,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209596017] [2020-10-27 14:09:28,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:28,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:09:28,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371896270] [2020-10-27 14:09:28,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:09:28,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:28,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:09:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:09:28,054 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 16 states. [2020-10-27 14:09:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:28,781 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-10-27 14:09:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:09:28,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-27 14:09:28,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:28,783 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:09:28,783 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:09:28,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:09:28,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:09:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-10-27 14:09:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 14:09:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-27 14:09:28,797 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2020-10-27 14:09:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:28,798 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-27 14:09:28,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:09:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-27 14:09:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:09:28,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:28,799 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:28,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:09:28,799 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1594043139, now seen corresponding path program 16 times [2020-10-27 14:09:28,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:28,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679450614] [2020-10-27 14:09:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:28,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:31,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:32,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:33,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:33,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 14:09:33,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:39,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:39,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:39,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:39,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:09:39,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679450614] [2020-10-27 14:09:39,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:39,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 14:09:39,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854552649] [2020-10-27 14:09:39,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 14:09:39,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 14:09:39,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3577, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:09:39,168 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 63 states. [2020-10-27 14:09:41,864 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-27 14:09:43,172 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-10-27 14:09:43,456 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-27 14:09:44,352 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-27 14:09:45,093 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-27 14:09:45,445 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-10-27 14:09:46,079 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-27 14:09:46,546 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2020-10-27 14:09:46,820 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-27 14:09:47,121 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-27 14:09:48,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:48,913 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-27 14:09:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-27 14:09:48,914 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 81 [2020-10-27 14:09:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:48,917 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:09:48,917 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 14:09:48,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2319 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=906, Invalid=9600, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 14:09:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 14:09:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 129. [2020-10-27 14:09:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:09:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2020-10-27 14:09:48,944 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 81 [2020-10-27 14:09:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:48,944 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2020-10-27 14:09:48,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 14:09:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2020-10-27 14:09:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:09:48,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:48,945 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:48,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:09:48,946 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1518712257, now seen corresponding path program 17 times [2020-10-27 14:09:48,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:48,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777682610] [2020-10-27 14:09:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:48,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:49,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:49,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:09:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:54,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:09:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:54,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:54,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:09:54,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:09:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-27 14:09:54,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777682610] [2020-10-27 14:09:54,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:09:54,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:09:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390683650] [2020-10-27 14:09:54,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:09:54,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:09:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:09:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:09:54,192 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 18 states. [2020-10-27 14:09:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:09:55,014 INFO L93 Difference]: Finished difference Result 270 states and 289 transitions. [2020-10-27 14:09:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:09:55,015 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-27 14:09:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:09:55,017 INFO L225 Difference]: With dead ends: 270 [2020-10-27 14:09:55,017 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 14:09:55,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:09:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 14:09:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-27 14:09:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:09:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2020-10-27 14:09:55,040 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 83 [2020-10-27 14:09:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:09:55,040 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2020-10-27 14:09:55,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:09:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2020-10-27 14:09:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:09:55,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:09:55,042 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:09:55,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:09:55,042 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:09:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:09:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash -506427073, now seen corresponding path program 18 times [2020-10-27 14:09:55,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:09:55,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426258152] [2020-10-27 14:09:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:09:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:09:55,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:55,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:55,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:09:57,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:00,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:00,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:10:00,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:10:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:10:00,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:10:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:00,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:10:00,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:00,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:00,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-27 14:10:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426258152] [2020-10-27 14:10:00,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:00,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:10:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839876950] [2020-10-27 14:10:00,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:10:00,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:10:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:10:00,329 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand 18 states. [2020-10-27 14:10:01,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:01,298 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2020-10-27 14:10:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:10:01,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 83 [2020-10-27 14:10:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:01,300 INFO L225 Difference]: With dead ends: 140 [2020-10-27 14:10:01,300 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 14:10:01,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:10:01,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 14:10:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-27 14:10:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:10:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-27 14:10:01,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-27 14:10:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:01,316 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-27 14:10:01,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:10:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-27 14:10:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:10:01,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:01,317 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:01,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:10:01,317 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:01,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1171466297, now seen corresponding path program 19 times [2020-10-27 14:10:01,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:01,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580723780] [2020-10-27 14:10:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:01,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:02,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:06,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:06,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:10:06,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:10:06,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:10:06,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 14:10:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:06,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 14:10:06,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:11,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:11,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:11,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:11,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:11,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:10:11,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580723780] [2020-10-27 14:10:11,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:11,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 14:10:11,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363854656] [2020-10-27 14:10:11,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 14:10:11,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 14:10:11,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2842, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 14:10:11,172 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 55 states. [2020-10-27 14:10:14,146 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-10-27 14:10:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:19,666 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2020-10-27 14:10:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:10:19,667 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 91 [2020-10-27 14:10:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:19,669 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:10:19,669 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 14:10:19,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=315, Invalid=6491, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 14:10:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 14:10:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2020-10-27 14:10:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:10:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-10-27 14:10:19,691 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 91 [2020-10-27 14:10:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:19,692 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-10-27 14:10:19,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 14:10:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-10-27 14:10:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:10:19,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:19,693 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:19,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:10:19,693 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash 463223369, now seen corresponding path program 20 times [2020-10-27 14:10:19,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:19,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320259955] [2020-10-27 14:10:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:19,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:19,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:19,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:24,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:24,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:10:24,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:10:24,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 14:10:24,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:10:24,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:10:24,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:10:24,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:25,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:25,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:25,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:25,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:25,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:25,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:25,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:25,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:25,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:25,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:25,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-27 14:10:25,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320259955] [2020-10-27 14:10:25,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:25,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:10:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464325271] [2020-10-27 14:10:25,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:10:25,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:10:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:10:25,063 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 20 states. [2020-10-27 14:10:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:26,148 INFO L93 Difference]: Finished difference Result 265 states and 281 transitions. [2020-10-27 14:10:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:10:26,151 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-27 14:10:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:26,153 INFO L225 Difference]: With dead ends: 265 [2020-10-27 14:10:26,153 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 14:10:26,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:10:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 14:10:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-27 14:10:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-27 14:10:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-27 14:10:26,180 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 93 [2020-10-27 14:10:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:26,180 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-27 14:10:26,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:10:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-27 14:10:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:10:26,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:26,182 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:26,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:10:26,182 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1038224139, now seen corresponding path program 21 times [2020-10-27 14:10:26,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:26,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908256143] [2020-10-27 14:10:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:26,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:31,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:31,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:31,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:10:31,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:31,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:31,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:31,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:31,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:31,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-27 14:10:31,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908256143] [2020-10-27 14:10:31,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:31,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:10:31,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58025174] [2020-10-27 14:10:31,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:10:31,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:31,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:10:31,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:10:31,535 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 20 states. [2020-10-27 14:10:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:10:32,770 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-27 14:10:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:10:32,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-27 14:10:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:10:32,773 INFO L225 Difference]: With dead ends: 140 [2020-10-27 14:10:32,773 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:10:32,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:10:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:10:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-27 14:10:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-27 14:10:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-27 14:10:32,794 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2020-10-27 14:10:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:10:32,794 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-27 14:10:32,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:10:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-27 14:10:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 14:10:32,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:10:32,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:10:32,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:10:32,796 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:10:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:10:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2095798767, now seen corresponding path program 22 times [2020-10-27 14:10:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:10:32,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804658543] [2020-10-27 14:10:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:10:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:32,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:34,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:36,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:38,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5197 [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 14:10:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 14:10:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:40,003 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-27 14:10:40,198 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-27 14:10:40,427 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-27 14:10:40,635 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-27 14:10:40,925 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-10-27 14:10:41,213 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2020-10-27 14:10:41,499 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-27 14:10:41,794 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-27 14:10:42,122 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-27 14:10:42,432 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-10-27 14:10:42,778 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-27 14:10:43,145 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-27 14:10:43,472 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2020-10-27 14:10:43,815 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-27 14:10:44,135 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-27 14:10:44,465 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-27 14:10:44,800 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-27 14:10:45,206 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-10-27 14:10:45,549 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-27 14:10:45,857 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-27 14:10:46,270 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-27 14:10:46,710 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-27 14:10:47,104 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 14:10:47,508 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-27 14:10:47,906 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-27 14:10:48,332 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2020-10-27 14:10:48,754 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-27 14:10:49,355 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-27 14:10:49,748 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-27 14:10:50,174 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-27 14:10:50,613 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2020-10-27 14:10:51,116 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-27 14:10:51,520 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-27 14:10:51,920 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-27 14:10:52,424 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-27 14:10:52,956 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-27 14:10:53,394 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-27 14:10:53,773 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-27 14:10:54,169 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-27 14:10:54,532 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-10-27 14:10:54,892 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-27 14:10:55,248 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-27 14:10:55,612 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-10-27 14:10:55,966 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-27 14:10:56,318 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-27 14:10:56,721 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-27 14:10:57,104 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-10-27 14:10:58,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:10:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:10:58,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:10:58,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:10:58,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:10:58,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:10:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:10:58,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:10:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:10:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:10:58,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:10:58,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:10:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 42 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:10:59,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804658543] [2020-10-27 14:10:59,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:10:59,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-27 14:10:59,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848428452] [2020-10-27 14:10:59,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-27 14:10:59,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:10:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-27 14:10:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=5824, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 14:10:59,090 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 79 states. [2020-10-27 14:10:59,627 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 3 [2020-10-27 14:11:00,404 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 39 [2020-10-27 14:11:01,467 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-10-27 14:11:01,930 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-27 14:11:03,104 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-10-27 14:11:03,650 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2020-10-27 14:11:04,286 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-27 14:11:04,827 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-10-27 14:11:05,405 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-27 14:11:05,886 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-27 14:11:06,542 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-10-27 14:11:07,212 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-27 14:11:08,000 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2020-10-27 14:11:08,989 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-27 14:11:09,907 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-27 14:11:10,710 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-10-27 14:11:11,504 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 94 [2020-10-27 14:11:12,415 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2020-10-27 14:11:12,952 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-27 14:11:13,618 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-10-27 14:11:14,040 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-27 14:11:14,566 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-10-27 14:11:15,078 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-27 14:11:15,625 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-27 14:11:16,136 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-27 14:11:16,674 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-27 14:11:17,203 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-27 14:11:17,767 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-10-27 14:11:18,310 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63