/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/bor3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:02:11,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:02:11,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:02:11,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:02:11,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:02:11,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:02:11,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:02:11,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:02:11,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:02:11,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:02:11,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:02:11,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:02:11,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:02:11,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:02:11,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:02:11,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:02:11,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:02:11,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:02:11,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:02:11,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:02:11,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:02:11,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:02:11,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:02:11,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:02:11,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:02:11,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:02:11,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:02:11,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:02:11,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:02:11,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:02:11,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:02:11,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:02:11,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:02:11,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:02:11,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:02:11,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:02:11,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:02:11,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:02:11,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:02:11,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:02:11,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:02:11,640 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 [2020-10-26 19:02:11,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:02:11,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:02:11,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:02:11,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:02:11,670 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:02:11,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:02:11,671 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:02:11,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:02:11,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:02:11,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:02:11,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:02:11,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:02:11,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:02:11,672 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:02:11,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:02:11,673 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:02:11,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:02:11,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:02:11,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:02:11,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:02:11,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:02:11,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:02:11,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:02:11,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:02:11,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:02:11,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:02:11,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:02:11,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:02:11,675 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:02:11,676 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:02:12,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:02:12,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:02:12,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:02:12,085 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:02:12,086 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:02:12,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor3.i [2020-10-26 19:02:12,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a5ee262f/841ca83b9a82480b90b09611fa248306/FLAG1652fb7c5 [2020-10-26 19:02:12,920 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:02:12,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/bor3.i [2020-10-26 19:02:12,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a5ee262f/841ca83b9a82480b90b09611fa248306/FLAG1652fb7c5 [2020-10-26 19:02:13,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a5ee262f/841ca83b9a82480b90b09611fa248306 [2020-10-26 19:02:13,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:02:13,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:02:13,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:13,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:02:13,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:02:13,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9b74ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13, skipping insertion in model container [2020-10-26 19:02:13,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:02:13,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:02:13,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:13,503 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:02:13,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:02:13,548 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:02:13,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13 WrapperNode [2020-10-26 19:02:13,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:02:13,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:02:13,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:02:13,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:02:13,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (1/1) ... [2020-10-26 19:02:13,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:02:13,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:02:13,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:02:13,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:02:13,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (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 [2020-10-26 19:02:13,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:02:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:02:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:02:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2020-10-26 19:02:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:02:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:02:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:02:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:02:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:02:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:02:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:02:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:02:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2020-10-26 19:02:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:02:13,669 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:02:13,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:02:13,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:02:13,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:02:13,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:02:13,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:02:14,212 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:02:14,213 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:02:14,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:14 BoogieIcfgContainer [2020-10-26 19:02:14,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:02:14,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:02:14,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:02:14,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:02:14,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:02:13" (1/3) ... [2020-10-26 19:02:14,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6247d479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:14, skipping insertion in model container [2020-10-26 19:02:14,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:02:13" (2/3) ... [2020-10-26 19:02:14,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6247d479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:02:14, skipping insertion in model container [2020-10-26 19:02:14,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:02:14" (3/3) ... [2020-10-26 19:02:14,225 INFO L111 eAbstractionObserver]: Analyzing ICFG bor3.i [2020-10-26 19:02:14,236 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:02:14,242 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:02:14,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:02:14,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:02:14,286 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:02:14,286 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:02:14,286 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:02:14,286 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:02:14,286 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:02:14,287 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:02:14,287 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:02:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-26 19:02:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:14,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:14,314 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-26 19:02:14,315 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1900796497, now seen corresponding path program 1 times [2020-10-26 19:02:14,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:14,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999705922] [2020-10-26 19:02:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:15,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:15,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-26 19:02:15,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:02:15,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:15,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:15,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:15,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:15,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:15,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:15,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:02:15,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:15,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:15,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:15,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:15,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:02:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:15,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:15,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:15,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:15,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:15,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:02:15,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:15,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:15,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999705922] [2020-10-26 19:02:15,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:15,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:02:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621006825] [2020-10-26 19:02:15,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:02:15,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:02:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:15,376 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-26 19:02:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:15,487 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-26 19:02:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:02:15,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-26 19:02:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:15,499 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:02:15,500 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 19:02:15,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:02:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 19:02:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 19:02:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 19:02:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-26 19:02:15,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2020-10-26 19:02:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:15,554 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-26 19:02:15,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:02:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-26 19:02:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:02:15,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:15,557 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-26 19:02:15,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:02:15,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1640105647, now seen corresponding path program 1 times [2020-10-26 19:02:15,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:15,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705103393] [2020-10-26 19:02:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:17,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:02:17,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:17,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1495 [2020-10-26 19:02:17,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:17,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:17,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:17,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:17,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:17,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:17,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:17,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:17,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:02:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:17,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:17,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:17,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:02:17,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:17,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-26 19:02:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:17,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:17,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:17,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:02:17,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:17,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:17,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:17,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:17,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:02:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:17,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:02:17,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:17,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:02:17,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:17,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:02:17,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:17,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:02:17,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:02:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705103393] [2020-10-26 19:02:17,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:02:17,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:02:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126509773] [2020-10-26 19:02:17,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:02:17,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:02:17,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:02:17,246 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-26 19:02:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:17,436 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-26 19:02:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:02:17,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-26 19:02:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:17,438 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:02:17,438 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:02:17,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:02:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:02:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-26 19:02:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:02:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:02:17,463 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 34 [2020-10-26 19:02:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:17,464 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:02:17,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:02:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:02:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:02:17,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:17,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:17,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:02:17,467 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1537402351, now seen corresponding path program 1 times [2020-10-26 19:02:17,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:17,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069705437] [2020-10-26 19:02:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:17,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:17,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:22,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:02:22,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4723 [2020-10-26 19:02:22,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:22,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-26 19:02:22,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:22,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:22,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:22,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:22,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:22,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:22,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:22,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:22,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:02:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:22,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:22,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:22,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:02:22,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:22,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:22,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-26 19:02:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:22,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:22,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:22,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:22,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:02:22,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:22,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:22,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:22,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:22,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:22,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:02:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:22,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:22,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 19:02:22,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 19:02:22,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:02:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:22,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:02:22,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 19:02:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069705437] [2020-10-26 19:02:22,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:22,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:02:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040360697] [2020-10-26 19:02:22,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:02:22,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:02:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:02:22,427 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-26 19:02:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:22,640 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-26 19:02:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:02:22,641 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-26 19:02:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:22,642 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:02:22,642 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:02:22,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:02:22,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-26 19:02:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:02:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-26 19:02:22,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 42 [2020-10-26 19:02:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:22,653 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-26 19:02:22,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:02:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-26 19:02:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:02:22,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:22,655 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:22,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:02:22,656 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:22,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1486624559, now seen corresponding path program 2 times [2020-10-26 19:02:22,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:22,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799266031] [2020-10-26 19:02:22,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:22,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:23,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:02:27,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:27,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:02:27,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:27,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:27,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:27,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:27,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:27,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:02:27,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:02:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:27,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:27,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 19:02:27,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:27,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 19:02:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:27,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:27,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:02:27,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:27,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:02:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:27,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:27,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:27,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 19:02:27,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 19:02:27,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:02:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:27,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:02:27,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:02:27,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799266031] [2020-10-26 19:02:27,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:27,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:02:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517486340] [2020-10-26 19:02:27,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:02:27,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:02:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:02:27,942 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-26 19:02:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:28,170 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-26 19:02:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:02:28,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-10-26 19:02:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:28,171 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:02:28,171 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:02:28,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:02:28,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:02:28,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-26 19:02:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:02:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-26 19:02:28,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 50 [2020-10-26 19:02:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:28,181 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-26 19:02:28,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:02:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-26 19:02:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:02:28,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:28,183 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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, 1] [2020-10-26 19:02:28,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:02:28,183 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1972987281, now seen corresponding path program 3 times [2020-10-26 19:02:28,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:28,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301826907] [2020-10-26 19:02:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:28,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:28,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:30,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:02:33,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:33,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:02:33,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:33,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:33,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:33,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:33,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:33,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:02:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:33,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:02:33,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:33,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:33,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-26 19:02:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:33,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:02:33,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:33,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:02:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:33,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 19:02:33,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 19:02:33,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:02:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:02:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:02:33,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301826907] [2020-10-26 19:02:33,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:33,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:02:33,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069881328] [2020-10-26 19:02:33,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:02:33,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:02:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:02:33,443 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-26 19:02:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:33,727 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-26 19:02:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:02:33,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:02:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:33,729 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:02:33,729 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:02:33,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:02:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-26 19:02:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:02:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-10-26 19:02:33,739 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 58 [2020-10-26 19:02:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:33,739 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-10-26 19:02:33,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:02:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-10-26 19:02:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:02:33,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:33,741 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 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, 1] [2020-10-26 19:02:33,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:02:33,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1550094417, now seen corresponding path program 4 times [2020-10-26 19:02:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:33,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739896556] [2020-10-26 19:02:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:33,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:36,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:02:38,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:38,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:02:38,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:38,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:02:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:38,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:02:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:38,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:38,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 19:02:38,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:38,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:38,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:38,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-26 19:02:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:38,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:38,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:38,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:38,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 19:02:38,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:38,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:39,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:02:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:39,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:39,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 19:02:39,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:39,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:02:39,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:02:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:02:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-26 19:02:39,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739896556] [2020-10-26 19:02:39,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:39,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:02:39,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828698669] [2020-10-26 19:02:39,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:02:39,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:39,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:02:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:02:39,047 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 13 states. [2020-10-26 19:02:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:39,327 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-26 19:02:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:02:39,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-26 19:02:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:39,329 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:02:39,329 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:02:39,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:02:39,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:02:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-26 19:02:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:02:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-26 19:02:39,338 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 66 [2020-10-26 19:02:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:39,338 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-26 19:02:39,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:02:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-26 19:02:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:02:39,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:39,340 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 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, 1] [2020-10-26 19:02:39,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:02:39,340 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash 407660817, now seen corresponding path program 5 times [2020-10-26 19:02:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726785452] [2020-10-26 19:02:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:39,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:39,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:44,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:44,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:02:44,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:44,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:44,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:02:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:44,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 19:02:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:44,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:02:44,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:02:44,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:02:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:44,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:44,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:44,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 19:02:44,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:44,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 19:02:44,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:44,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:02:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:44,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:02:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 75 proven. 175 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:02:44,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726785452] [2020-10-26 19:02:44,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:44,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:02:44,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690341095] [2020-10-26 19:02:44,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:02:44,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:02:44,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:02:44,685 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 15 states. [2020-10-26 19:02:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:45,148 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-26 19:02:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:02:45,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-26 19:02:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:45,149 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:02:45,150 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:02:45,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:02:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:02:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-26 19:02:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:02:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-26 19:02:45,160 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 74 [2020-10-26 19:02:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:45,161 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-26 19:02:45,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:02:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-26 19:02:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:02:45,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:45,163 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 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, 1] [2020-10-26 19:02:45,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:02:45,163 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -990384175, now seen corresponding path program 6 times [2020-10-26 19:02:45,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:45,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118223626] [2020-10-26 19:02:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:45,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:02:50,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:02:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:50,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:50,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:02:50,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:50,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:50,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:50,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:02:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-26 19:02:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:50,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:02:50,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:50,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:02:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:50,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:50,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 19:02:50,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:50,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 19:02:50,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:02:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:02:50,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 108 proven. 252 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:02:50,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118223626] [2020-10-26 19:02:50,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:50,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:02:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012208117] [2020-10-26 19:02:50,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:02:50,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:50,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:02:50,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:02:50,582 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 17 states. [2020-10-26 19:02:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:51,084 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-10-26 19:02:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:02:51,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:02:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:51,086 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:02:51,086 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:02:51,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:02:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:02:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-26 19:02:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:02:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-26 19:02:51,104 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 82 [2020-10-26 19:02:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:51,105 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-26 19:02:51,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:02:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-26 19:02:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:02:51,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:51,109 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 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, 1] [2020-10-26 19:02:51,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:02:51,110 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash -852613999, now seen corresponding path program 7 times [2020-10-26 19:02:51,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:51,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011850769] [2020-10-26 19:02:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:51,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:51,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:56,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:56,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:56,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:02:56,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:56,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:02:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:56,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 19:02:56,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:56,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:56,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 19:02:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:56,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 19:02:56,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:56,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:02:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:56,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:56,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:56,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:02:56,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:56,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 19:02:56,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:02:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:02:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:02:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 147 proven. 343 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-26 19:02:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011850769] [2020-10-26 19:02:56,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:56,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:02:56,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125892871] [2020-10-26 19:02:56,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:02:56,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:02:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:02:56,581 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 19 states. [2020-10-26 19:02:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:57,167 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-26 19:02:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:02:57,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-26 19:02:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:57,169 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:02:57,169 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:02:57,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:02:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:02:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-26 19:02:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:02:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-26 19:02:57,191 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 90 [2020-10-26 19:02:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:57,192 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-26 19:02:57,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:02:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-26 19:02:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:02:57,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:57,196 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 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, 1] [2020-10-26 19:02:57,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:02:57,196 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -623507631, now seen corresponding path program 8 times [2020-10-26 19:02:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:57,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8767901] [2020-10-26 19:02:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:57,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:57,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:57,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:57,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:02,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:02,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:02,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:03:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:02,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:02,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:03:02,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:02,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:02,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:02,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 19:03:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 19:03:02,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:03:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:02,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:02,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:03:02,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 192 proven. 448 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:03:02,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8767901] [2020-10-26 19:03:02,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:02,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:03:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792408099] [2020-10-26 19:03:02,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:03:02,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:03:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:03:02,692 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 21 states. [2020-10-26 19:03:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:03,326 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-10-26 19:03:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:03:03,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 98 [2020-10-26 19:03:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:03,328 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:03:03,328 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:03:03,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:03:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:03:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-26 19:03:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:03:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-26 19:03:03,338 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 98 [2020-10-26 19:03:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:03,338 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-26 19:03:03,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:03:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-26 19:03:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:03:03,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:03,340 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 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, 1] [2020-10-26 19:03:03,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:03:03,340 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash -956917743, now seen corresponding path program 9 times [2020-10-26 19:03:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:03,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132090912] [2020-10-26 19:03:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:03,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:03,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:08,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:08,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:08,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:03:08,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:08,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:08,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:08,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:03:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-26 19:03:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:08,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:03:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:08,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:08,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:08,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:03:08,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:08,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 19:03:08,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:08,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:03:08,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:08,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:03:08,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 243 proven. 567 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 19:03:08,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132090912] [2020-10-26 19:03:08,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:08,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:03:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107029169] [2020-10-26 19:03:08,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:03:08,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:03:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:03:08,882 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 23 states. [2020-10-26 19:03:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:09,572 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2020-10-26 19:03:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:03:09,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-26 19:03:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:09,573 INFO L225 Difference]: With dead ends: 105 [2020-10-26 19:03:09,573 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:03:09,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:03:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-26 19:03:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:03:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-26 19:03:09,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 106 [2020-10-26 19:03:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:09,584 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-26 19:03:09,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:03:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-26 19:03:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:03:09,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:09,590 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 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, 1] [2020-10-26 19:03:09,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:03:09,591 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1984506159, now seen corresponding path program 10 times [2020-10-26 19:03:09,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:09,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331573069] [2020-10-26 19:03:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:09,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:09,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:09,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:09,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:03:14,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:14,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:03:14,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:14,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:14,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:14,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:14,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:14,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:03:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:14,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:14,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:14,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:14,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:14,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:03:14,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:14,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:14,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:14,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:15,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 19:03:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:15,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:15,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:15,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:15,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 19:03:15,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:15,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:15,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:15,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:15,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:15,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:03:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:15,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:15,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:03:15,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:15,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 19:03:15,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:03:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:15,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:03:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 300 proven. 700 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:03:15,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331573069] [2020-10-26 19:03:15,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:15,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:03:15,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844475431] [2020-10-26 19:03:15,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:03:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:15,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:03:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:03:15,359 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 25 states. [2020-10-26 19:03:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:16,116 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2020-10-26 19:03:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:03:16,117 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-10-26 19:03:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:16,118 INFO L225 Difference]: With dead ends: 111 [2020-10-26 19:03:16,118 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:03:16,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:03:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:03:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-26 19:03:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:03:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-10-26 19:03:16,129 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 114 [2020-10-26 19:03:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:16,129 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-10-26 19:03:16,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:03:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-10-26 19:03:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:03:16,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:16,131 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 11, 11, 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, 1] [2020-10-26 19:03:16,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:03:16,131 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:16,132 INFO L82 PathProgramCache]: Analyzing trace with hash 710787985, now seen corresponding path program 11 times [2020-10-26 19:03:16,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:16,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231155688] [2020-10-26 19:03:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:16,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:16,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:16,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:21,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:03:21,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:21,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:03:21,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:21,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:21,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:21,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:21,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:21,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:21,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:21,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:03:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:21,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:21,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:21,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 19:03:21,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:21,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:21,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:21,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:03:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:21,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:21,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:21,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 19:03:21,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:21,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:21,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:21,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:03:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:21,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:21,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:21,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:03:21,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 363 proven. 847 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:03:21,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231155688] [2020-10-26 19:03:21,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:21,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:03:21,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626229527] [2020-10-26 19:03:21,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:03:21,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:03:21,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:03:21,849 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2020-10-26 19:03:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:22,670 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2020-10-26 19:03:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:03:22,670 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-10-26 19:03:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:22,672 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:03:22,672 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:03:22,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:03:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:03:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-26 19:03:22,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:03:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-26 19:03:22,694 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 122 [2020-10-26 19:03:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:22,694 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-26 19:03:22,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:03:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-26 19:03:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 19:03:22,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:22,699 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 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, 1] [2020-10-26 19:03:22,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:03:22,700 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1353556399, now seen corresponding path program 12 times [2020-10-26 19:03:22,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:22,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588465196] [2020-10-26 19:03:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:22,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:03:27,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:27,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:03:27,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:27,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:27,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:27,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:27,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:27,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:27,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:03:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:27,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:28,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:28,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:28,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 19:03:28,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:28,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:28,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:28,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:28,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-26 19:03:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:28,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:28,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:28,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:28,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 19:03:28,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:28,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:28,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:28,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:28,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:28,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:03:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:28,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:28,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:03:28,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 432 proven. 1008 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-26 19:03:28,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588465196] [2020-10-26 19:03:28,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:28,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:03:28,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74628338] [2020-10-26 19:03:28,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:03:28,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:03:28,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:03:28,537 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 29 states. [2020-10-26 19:03:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:29,527 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-26 19:03:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:03:29,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-10-26 19:03:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:29,529 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:03:29,529 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:03:29,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:03:29,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:03:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-26 19:03:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:03:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-26 19:03:29,541 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 130 [2020-10-26 19:03:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:29,542 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-26 19:03:29,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:03:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-26 19:03:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:03:29,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:29,543 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 13, 13, 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, 1] [2020-10-26 19:03:29,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:03:29,544 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:29,544 INFO L82 PathProgramCache]: Analyzing trace with hash 236693265, now seen corresponding path program 13 times [2020-10-26 19:03:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:29,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212071030] [2020-10-26 19:03:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:29,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:29,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:29,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:34,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:34,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:34,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:34,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:03:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:34,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:34,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:03:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:35,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:35,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:03:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:03:35,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1783 backedges. 507 proven. 1183 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-26 19:03:35,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212071030] [2020-10-26 19:03:35,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:35,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:03:35,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265247414] [2020-10-26 19:03:35,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:03:35,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:03:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:03:35,407 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 31 states. [2020-10-26 19:03:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:36,442 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-10-26 19:03:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:03:36,443 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-26 19:03:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:36,444 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:03:36,444 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:03:36,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:03:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:03:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-26 19:03:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:03:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-26 19:03:36,463 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 138 [2020-10-26 19:03:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:36,464 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-26 19:03:36,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:03:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-26 19:03:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-26 19:03:36,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:36,465 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 14, 14, 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, 1] [2020-10-26 19:03:36,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:03:36,466 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 459316689, now seen corresponding path program 14 times [2020-10-26 19:03:36,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:36,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262766436] [2020-10-26 19:03:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:36,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:36,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:41,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:41,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:41,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:41,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:03:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:41,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:41,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:41,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:41,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:41,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 19:03:41,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:41,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:41,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:41,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:41,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:42,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-26 19:03:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:42,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:42,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:03:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:03:42,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 588 proven. 1372 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-26 19:03:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262766436] [2020-10-26 19:03:42,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:42,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:03:42,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032609243] [2020-10-26 19:03:42,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:03:42,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:42,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:03:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:03:42,383 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 33 states. [2020-10-26 19:03:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:43,530 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2020-10-26 19:03:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:03:43,532 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 146 [2020-10-26 19:03:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:43,533 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:03:43,533 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:03:43,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:03:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:03:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-26 19:03:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:03:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-26 19:03:43,548 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 146 [2020-10-26 19:03:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:43,549 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-26 19:03:43,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:03:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-26 19:03:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 19:03:43,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:43,552 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 15, 15, 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, 1] [2020-10-26 19:03:43,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:03:43,552 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:43,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2062041745, now seen corresponding path program 15 times [2020-10-26 19:03:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:43,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424060604] [2020-10-26 19:03:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:43,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:43,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:43,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:48,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:03:48,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:48,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:03:48,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:48,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:48,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:48,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:48,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:03:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:48,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:48,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:48,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:49,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:03:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:49,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:49,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:49,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:49,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:03:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:49,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:49,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:49,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:03:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 675 proven. 1575 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:03:49,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424060604] [2020-10-26 19:03:49,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:49,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:03:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450395904] [2020-10-26 19:03:49,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:03:49,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:03:49,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:03:49,656 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 35 states. [2020-10-26 19:03:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:50,883 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2020-10-26 19:03:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:03:50,884 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 154 [2020-10-26 19:03:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:50,885 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:03:50,885 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:03:50,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:03:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:03:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-26 19:03:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:03:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-26 19:03:50,894 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 154 [2020-10-26 19:03:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:50,895 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-26 19:03:50,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:03:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-26 19:03:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:03:50,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:50,897 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 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, 1] [2020-10-26 19:03:50,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:03:50,897 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1885760175, now seen corresponding path program 16 times [2020-10-26 19:03:50,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:50,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403908070] [2020-10-26 19:03:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:50,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:51,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:55,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:55,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:56,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:03:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:56,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:56,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:03:56,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:03:56,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:03:56,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:03:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:03:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:03:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:56,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:03:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:56,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:56,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:56,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 19:03:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:56,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:56,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:56,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:56,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 19:03:56,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:56,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:56,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-26 19:03:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:56,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:03:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:03:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 768 proven. 1792 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 19:03:56,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403908070] [2020-10-26 19:03:56,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:03:56,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:03:56,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683876661] [2020-10-26 19:03:56,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:03:56,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:03:56,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:03:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:03:56,992 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 37 states. [2020-10-26 19:03:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:03:58,155 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2020-10-26 19:03:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:03:58,156 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-26 19:03:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:03:58,158 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:03:58,158 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:03:58,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2020-10-26 19:03:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:03:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-26 19:03:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:03:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-10-26 19:03:58,166 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 162 [2020-10-26 19:03:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:03:58,166 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-10-26 19:03:58,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:03:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-10-26 19:03:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 19:03:58,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:03:58,169 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 17, 17, 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, 1] [2020-10-26 19:03:58,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:03:58,169 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:03:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:03:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1803261457, now seen corresponding path program 17 times [2020-10-26 19:03:58,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:03:58,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306597031] [2020-10-26 19:03:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:03:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:03:58,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:03:58,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:03,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-26 19:04:03,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:03,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:04:03,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:03,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:03,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:03,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:03,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:03,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:03,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:04:03,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:03,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:03,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:04:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:03,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:03,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:04:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:04,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:04,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:04,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:04,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:04,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-26 19:04:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:04,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:04:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3007 backedges. 867 proven. 2023 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:04:04,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306597031] [2020-10-26 19:04:04,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:04,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:04:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694898685] [2020-10-26 19:04:04,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:04:04,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:04:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:04:04,413 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 39 states. [2020-10-26 19:04:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:05,860 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-10-26 19:04:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:04:05,860 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-10-26 19:04:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:05,862 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:04:05,862 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:04:05,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:04:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:04:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-26 19:04:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:04:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-10-26 19:04:05,871 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 170 [2020-10-26 19:04:05,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:05,871 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-10-26 19:04:05,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:04:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-10-26 19:04:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:04:05,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:05,874 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 18, 18, 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, 1] [2020-10-26 19:04:05,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:04:05,874 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1078639407, now seen corresponding path program 18 times [2020-10-26 19:04:05,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:05,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679113275] [2020-10-26 19:04:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:05,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:05,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:10,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:10,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:10,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:11,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:11,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:11,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:04:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:11,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:11,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:11,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:11,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 19:04:11,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:11,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:11,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:11,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:11,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:11,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:04:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:11,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:12,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:12,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:12,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:12,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 19:04:12,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:12,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:12,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-26 19:04:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:12,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:12,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:12,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:04:12,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3363 backedges. 972 proven. 2268 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-26 19:04:12,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679113275] [2020-10-26 19:04:12,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:12,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:04:12,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131178426] [2020-10-26 19:04:12,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:04:12,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:12,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:04:12,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:04:12,215 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 41 states. [2020-10-26 19:04:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:13,815 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-26 19:04:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:04:13,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 178 [2020-10-26 19:04:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:13,817 INFO L225 Difference]: With dead ends: 159 [2020-10-26 19:04:13,817 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:04:13,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2020-10-26 19:04:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:04:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-26 19:04:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:04:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-26 19:04:13,831 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 178 [2020-10-26 19:04:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:13,831 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-26 19:04:13,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:04:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-26 19:04:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-26 19:04:13,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:13,834 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 19, 19, 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, 1] [2020-10-26 19:04:13,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:04:13,834 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -863133295, now seen corresponding path program 19 times [2020-10-26 19:04:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:13,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066090600] [2020-10-26 19:04:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:13,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:13,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:18,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:19,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:19,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:19,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:04:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:19,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:19,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:19,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:20,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-10-26 19:04:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:20,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:20,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 19:04:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:20,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:20,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:20,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:04:20,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3739 backedges. 1083 proven. 2527 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2020-10-26 19:04:20,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066090600] [2020-10-26 19:04:20,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:20,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:04:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842813480] [2020-10-26 19:04:20,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:04:20,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:20,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:04:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:04:20,301 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 43 states. [2020-10-26 19:04:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:21,957 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2020-10-26 19:04:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:04:21,958 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 186 [2020-10-26 19:04:21,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:21,960 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:04:21,960 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:04:21,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:04:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:04:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-26 19:04:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:04:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-10-26 19:04:21,969 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 186 [2020-10-26 19:04:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:21,970 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-10-26 19:04:21,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:04:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-10-26 19:04:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 19:04:21,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:21,971 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 20, 20, 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, 1] [2020-10-26 19:04:21,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:04:21,972 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1366010961, now seen corresponding path program 20 times [2020-10-26 19:04:21,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:21,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384349075] [2020-10-26 19:04:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:22,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:22,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:04:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:04:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:27,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:27,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:27,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:04:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:27,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:27,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:27,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:27,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 19:04:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:28,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 19:04:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:28,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:28,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:28,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:28,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 19:04:28,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:28,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:28,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:28,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-26 19:04:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:28,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:28,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:28,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:28,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:04:28,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:28,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-26 19:04:28,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:28,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:04:28,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:28,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:04:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4135 backedges. 1200 proven. 2800 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-26 19:04:28,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384349075] [2020-10-26 19:04:28,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:28,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:04:28,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720095914] [2020-10-26 19:04:28,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:04:28,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:04:28,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:04:28,530 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 45 states. [2020-10-26 19:04:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:30,364 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2020-10-26 19:04:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:04:30,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 194 [2020-10-26 19:04:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:30,368 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:04:30,368 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:04:30,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2020-10-26 19:04:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:04:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-26 19:04:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:04:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-26 19:04:30,382 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 194 [2020-10-26 19:04:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:30,382 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-26 19:04:30,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:04:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-26 19:04:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:04:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:30,384 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 21, 21, 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, 1] [2020-10-26 19:04:30,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:04:30,384 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2094425361, now seen corresponding path program 21 times [2020-10-26 19:04:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:30,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474197793] [2020-10-26 19:04:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:30,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:30,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:35,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:35,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:35,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:35,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:35,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:04:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:35,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:36,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 19:04:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:36,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:36,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:36,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:36,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-26 19:04:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:37,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:37,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:04:37,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:37,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-26 19:04:37,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:37,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:04:37,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:37,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:04:37,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4551 backedges. 1323 proven. 3087 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-26 19:04:37,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474197793] [2020-10-26 19:04:37,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:37,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:04:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332133814] [2020-10-26 19:04:37,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:04:37,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:04:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:04:37,184 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 47 states. [2020-10-26 19:04:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:38,961 INFO L93 Difference]: Finished difference Result 177 states and 189 transitions. [2020-10-26 19:04:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:04:38,961 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 202 [2020-10-26 19:04:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:38,963 INFO L225 Difference]: With dead ends: 177 [2020-10-26 19:04:38,963 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:04:38,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:04:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:04:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-26 19:04:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:04:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2020-10-26 19:04:38,973 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 202 [2020-10-26 19:04:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:38,973 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2020-10-26 19:04:38,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:04:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2020-10-26 19:04:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-26 19:04:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:38,975 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 22, 22, 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, 1] [2020-10-26 19:04:38,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:04:38,975 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash -596325423, now seen corresponding path program 22 times [2020-10-26 19:04:38,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:38,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563637108] [2020-10-26 19:04:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:39,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:39,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:44,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:44,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:44,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:44,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:04:44,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:44,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:04:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:44,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:44,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:45,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-10-26 19:04:45,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:45,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:45,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:45,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:45,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 19:04:45,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:45,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:45,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:45,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-26 19:04:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:45,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:04:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4987 backedges. 1452 proven. 3388 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-26 19:04:45,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563637108] [2020-10-26 19:04:45,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:45,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:04:45,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100069412] [2020-10-26 19:04:45,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:04:45,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:04:45,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:04:45,764 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 49 states. [2020-10-26 19:04:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:47,711 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2020-10-26 19:04:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:04:47,711 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 210 [2020-10-26 19:04:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:47,712 INFO L225 Difference]: With dead ends: 183 [2020-10-26 19:04:47,712 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:04:47,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:04:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:04:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-26 19:04:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:04:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-26 19:04:47,723 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 210 [2020-10-26 19:04:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:47,723 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-26 19:04:47,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:04:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-26 19:04:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:04:47,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:47,725 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 23, 23, 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, 1] [2020-10-26 19:04:47,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:04:47,725 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1292755089, now seen corresponding path program 23 times [2020-10-26 19:04:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750994398] [2020-10-26 19:04:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:47,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:47,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:47,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:52,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:52,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:52,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:53,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:04:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:04:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:04:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:53,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:04:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:53,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:53,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:53,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:53,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:53,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:53,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-26 19:04:53,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:53,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:53,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:53,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:53,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:54,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-26 19:04:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:54,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:54,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:54,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:54,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:54,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-26 19:04:54,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:54,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:54,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:54,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:54,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:54,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-10-26 19:04:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:54,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:54,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:04:54,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:04:54,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:04:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5443 backedges. 1587 proven. 3703 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-26 19:04:54,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750994398] [2020-10-26 19:04:54,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:04:54,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-26 19:04:54,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737300121] [2020-10-26 19:04:54,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-26 19:04:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:04:54,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-26 19:04:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2020-10-26 19:04:54,686 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 51 states. [2020-10-26 19:04:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:04:56,903 INFO L93 Difference]: Finished difference Result 189 states and 201 transitions. [2020-10-26 19:04:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-26 19:04:56,904 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 218 [2020-10-26 19:04:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:04:56,905 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:04:56,905 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:04:56,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:04:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:04:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-26 19:04:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:04:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2020-10-26 19:04:56,914 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 218 [2020-10-26 19:04:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:04:56,914 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2020-10-26 19:04:56,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-26 19:04:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2020-10-26 19:04:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-26 19:04:56,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:04:56,916 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 24, 24, 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, 1] [2020-10-26 19:04:56,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:04:56,916 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:04:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:04:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash -360144047, now seen corresponding path program 24 times [2020-10-26 19:04:56,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:04:56,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351193360] [2020-10-26 19:04:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:04:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:04:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:56,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:04:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:01,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:01,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:02,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:02,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:02,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:05:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:02,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:02,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:02,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:03,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-10-26 19:05:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:03,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:03,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-26 19:05:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:03,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:05:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:03,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:05:03,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5919 backedges. 1728 proven. 4032 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-26 19:05:03,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351193360] [2020-10-26 19:05:03,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:03,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:05:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928997859] [2020-10-26 19:05:03,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:05:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:05:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:05:03,962 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 53 states. [2020-10-26 19:05:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:06,083 INFO L93 Difference]: Finished difference Result 195 states and 207 transitions. [2020-10-26 19:05:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:05:06,084 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 226 [2020-10-26 19:05:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:06,085 INFO L225 Difference]: With dead ends: 195 [2020-10-26 19:05:06,085 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:05:06,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2020-10-26 19:05:06,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:05:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-26 19:05:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:05:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-26 19:05:06,098 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 226 [2020-10-26 19:05:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:06,098 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-26 19:05:06,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:05:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-26 19:05:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-26 19:05:06,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:06,100 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 25, 25, 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, 1] [2020-10-26 19:05:06,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:05:06,100 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1305583, now seen corresponding path program 25 times [2020-10-26 19:05:06,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:06,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586085856] [2020-10-26 19:05:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:06,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:06,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:11,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:11,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:11,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:11,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:05:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:11,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:11,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-10-26 19:05:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:12,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:12,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:13,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:13,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 19:05:13,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:13,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-26 19:05:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:13,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:13,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:13,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:05:13,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:13,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 19:05:13,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:13,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:05:13,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:13,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:05:13,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6415 backedges. 1875 proven. 4375 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-26 19:05:13,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586085856] [2020-10-26 19:05:13,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:13,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-26 19:05:13,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873856058] [2020-10-26 19:05:13,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-26 19:05:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:13,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-26 19:05:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2020-10-26 19:05:13,240 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 55 states. [2020-10-26 19:05:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:15,642 INFO L93 Difference]: Finished difference Result 201 states and 213 transitions. [2020-10-26 19:05:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-26 19:05:15,643 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 234 [2020-10-26 19:05:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:15,644 INFO L225 Difference]: With dead ends: 201 [2020-10-26 19:05:15,644 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:05:15,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2020-10-26 19:05:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:05:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-26 19:05:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:05:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2020-10-26 19:05:15,653 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 234 [2020-10-26 19:05:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:15,653 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2020-10-26 19:05:15,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-26 19:05:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2020-10-26 19:05:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-26 19:05:15,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:15,655 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 26, 26, 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, 1] [2020-10-26 19:05:15,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:05:15,655 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash -144756015, now seen corresponding path program 26 times [2020-10-26 19:05:15,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:15,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004158327] [2020-10-26 19:05:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:15,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:15,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:20,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:20,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-26 19:05:20,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:20,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:05:20,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:20,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:20,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:20,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:20,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:21,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:21,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:21,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:21,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:21,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:05:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:21,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:21,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:21,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:21,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:21,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 19:05:21,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:21,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:22,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 19:05:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:22,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:22,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:22,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-26 19:05:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:22,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:22,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:22,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:22,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:05:22,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:22,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 19:05:22,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:22,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:05:22,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:22,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:05:22,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6931 backedges. 2028 proven. 4732 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-26 19:05:23,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004158327] [2020-10-26 19:05:23,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:23,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:05:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936820970] [2020-10-26 19:05:23,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:05:23,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:05:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:05:23,022 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 57 states. [2020-10-26 19:05:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:25,580 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2020-10-26 19:05:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-26 19:05:25,581 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 242 [2020-10-26 19:05:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:25,583 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:05:25,583 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:05:25,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2020-10-26 19:05:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:05:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-26 19:05:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-26 19:05:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-26 19:05:25,594 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 242 [2020-10-26 19:05:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:25,594 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-26 19:05:25,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-26 19:05:25,594 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-26 19:05:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 19:05:25,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:25,596 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 27, 27, 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, 1] [2020-10-26 19:05:25,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:05:25,596 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1244200849, now seen corresponding path program 27 times [2020-10-26 19:05:25,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:25,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914070978] [2020-10-26 19:05:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:25,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:30,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:31,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:31,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:31,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:31,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:05:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:31,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:31,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:31,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:31,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:31,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:31,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 19:05:31,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:31,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:31,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:31,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:31,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:32,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-10-26 19:05:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:32,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:32,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:32,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:32,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:32,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-26 19:05:32,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:32,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:32,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:32,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-26 19:05:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:32,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:05:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7467 backedges. 2187 proven. 5103 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:05:32,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914070978] [2020-10-26 19:05:32,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:32,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:05:32,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329885175] [2020-10-26 19:05:32,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:05:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:32,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:05:32,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:05:32,978 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 59 states. [2020-10-26 19:05:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:35,729 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2020-10-26 19:05:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-26 19:05:35,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 250 [2020-10-26 19:05:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:35,732 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:05:35,732 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:05:35,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2020-10-26 19:05:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:05:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-26 19:05:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:05:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-26 19:05:35,742 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 250 [2020-10-26 19:05:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:35,742 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-26 19:05:35,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:05:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-26 19:05:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 19:05:35,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:35,744 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 28, 28, 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, 1] [2020-10-26 19:05:35,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:05:35,745 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1890613841, now seen corresponding path program 28 times [2020-10-26 19:05:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:35,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063917586] [2020-10-26 19:05:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:35,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:35,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:40,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:41,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:05:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:41,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:41,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:41,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:41,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 19:05:41,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:42,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-10-26 19:05:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:42,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:43,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:43,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:43,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:43,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-10-26 19:05:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:43,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:43,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:43,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:43,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:05:43,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:43,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-26 19:05:43,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:43,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:05:43,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:43,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:05:43,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8023 backedges. 2352 proven. 5488 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-26 19:05:43,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063917586] [2020-10-26 19:05:43,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:43,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-26 19:05:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048653919] [2020-10-26 19:05:43,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-26 19:05:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-26 19:05:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:05:43,336 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 61 states. [2020-10-26 19:05:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:46,083 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2020-10-26 19:05:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:05:46,084 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 258 [2020-10-26 19:05:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:46,085 INFO L225 Difference]: With dead ends: 219 [2020-10-26 19:05:46,085 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:05:46,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2020-10-26 19:05:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:05:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-26 19:05:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:05:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-26 19:05:46,095 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 258 [2020-10-26 19:05:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:46,096 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-26 19:05:46,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-26 19:05:46,096 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-26 19:05:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-26 19:05:46,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:46,098 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 29, 29, 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, 1] [2020-10-26 19:05:46,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:05:46,098 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -763583727, now seen corresponding path program 29 times [2020-10-26 19:05:46,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:46,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426662631] [2020-10-26 19:05:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:46,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:46,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:51,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:05:51,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:51,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:51,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:05:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:51,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:05:51,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:05:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:05:51,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:05:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:05:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:05:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:51,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:05:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:51,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:52,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:52,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:52,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:52,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 19:05:52,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:52,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:52,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 19:05:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:53,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:53,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-10-26 19:05:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:53,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:53,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:05:53,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:05:53,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:05:53,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 19:05:53,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:05:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:05:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:05:53,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:05:53,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:05:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8599 backedges. 2523 proven. 5887 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-26 19:05:53,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426662631] [2020-10-26 19:05:53,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:05:53,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-26 19:05:53,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787548768] [2020-10-26 19:05:53,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-26 19:05:53,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:05:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-26 19:05:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2020-10-26 19:05:53,909 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 63 states. [2020-10-26 19:05:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:05:56,958 INFO L93 Difference]: Finished difference Result 225 states and 237 transitions. [2020-10-26 19:05:56,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-26 19:05:56,960 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 266 [2020-10-26 19:05:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:05:56,962 INFO L225 Difference]: With dead ends: 225 [2020-10-26 19:05:56,962 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:05:56,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2020-10-26 19:05:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:05:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-26 19:05:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-26 19:05:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-26 19:05:56,972 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 266 [2020-10-26 19:05:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:05:56,972 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-26 19:05:56,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-26 19:05:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-26 19:05:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 19:05:56,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:05:56,974 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 30, 30, 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, 1] [2020-10-26 19:05:56,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:05:56,974 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:05:56,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:05:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1238074927, now seen corresponding path program 30 times [2020-10-26 19:05:56,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:05:56,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613835751] [2020-10-26 19:05:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:05:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:05:57,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:05:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 19:06:02,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:06:02,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:06:02,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:06:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:06:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:06:02,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:06:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:02,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:03,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:03,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:06:03,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0