/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:48:24,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:48:24,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:48:24,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:48:24,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:48:24,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:48:24,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:48:24,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:48:24,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:48:24,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:48:24,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:48:24,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:48:24,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:48:24,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:48:24,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:48:24,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:48:24,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:48:24,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:48:24,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:48:24,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:48:24,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:48:24,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:48:24,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:48:24,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:48:24,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:48:24,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:48:24,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:48:24,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:48:24,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:48:24,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:48:24,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:48:24,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:48:24,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:48:24,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:48:24,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:48:24,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:48:24,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:48:24,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:48:24,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:48:24,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:48:24,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:48:24,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 18:48:24,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:48:24,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:48:24,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:48:24,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:48:24,307 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:48:24,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:48:24,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:48:24,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:48:24,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:48:24,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:48:24,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:48:24,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:48:24,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:48:24,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:48:24,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:48:24,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:48:24,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:48:24,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:48:24,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:48:24,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:48:24,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:48:24,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:48:24,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:48:24,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:48:24,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:48:24,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:48:24,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:48:24,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:48:24,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:48:24,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:48:24,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:48:24,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:48:24,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:48:24,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:48:24,841 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:48:24,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label07.c [2020-10-27 18:48:24,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f164ef94/b7ff24ed5236435487de9838e19edb68/FLAGfc37f43b6 [2020-10-27 18:48:25,909 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:48:25,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label07.c [2020-10-27 18:48:25,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f164ef94/b7ff24ed5236435487de9838e19edb68/FLAGfc37f43b6 [2020-10-27 18:48:26,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f164ef94/b7ff24ed5236435487de9838e19edb68 [2020-10-27 18:48:26,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:48:26,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:48:26,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:48:26,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:48:26,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:48:26,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:48:26" (1/1) ... [2020-10-27 18:48:26,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413e5045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:26, skipping insertion in model container [2020-10-27 18:48:26,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:48:26" (1/1) ... [2020-10-27 18:48:26,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:48:26,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:48:27,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:48:27,805 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:48:28,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:48:28,567 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:48:28,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28 WrapperNode [2020-10-27 18:48:28,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:48:28,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:48:28,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:48:28,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:48:28,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... [2020-10-27 18:48:28,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:48:28,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:48:28,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:48:28,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:48:28,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:48:29,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:48:29,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:48:29,023 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:48:29,023 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:48:29,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:48:29,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:48:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:48:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:48:29,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:48:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:48:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:48:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:48:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:48:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:48:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:48:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:48:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:48:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:48:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:48:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:48:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:48:38,347 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:48:38,347 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:48:38,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:48:38 BoogieIcfgContainer [2020-10-27 18:48:38,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:48:38,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:48:38,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:48:38,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:48:38,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:48:26" (1/3) ... [2020-10-27 18:48:38,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4002302b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:48:38, skipping insertion in model container [2020-10-27 18:48:38,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:48:28" (2/3) ... [2020-10-27 18:48:38,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4002302b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:48:38, skipping insertion in model container [2020-10-27 18:48:38,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:48:38" (3/3) ... [2020-10-27 18:48:38,362 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label07.c [2020-10-27 18:48:38,375 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:48:38,382 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:48:38,397 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:48:38,440 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:48:38,440 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:48:38,440 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:48:38,440 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:48:38,441 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:48:38,441 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:48:38,441 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:48:38,441 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:48:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:48:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 18:48:38,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:38,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:38,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:38,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash -379654902, now seen corresponding path program 1 times [2020-10-27 18:48:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:38,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156749709] [2020-10-27 18:48:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:38,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:39,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:39,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 18:48:39,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:39,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-27 18:48:39,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:39,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:48:39,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:48:39,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 18:48:39,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:48:39,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:39,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:39,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:39,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:39,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 18:48:39,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:48:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:39,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156749709] [2020-10-27 18:48:39,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:48:39,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 18:48:39,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47522281] [2020-10-27 18:48:39,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:39,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:39,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:39,771 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 5 states. [2020-10-27 18:48:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:56,801 INFO L93 Difference]: Finished difference Result 2174 states and 4022 transitions. [2020-10-27 18:48:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:48:56,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-27 18:48:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:56,839 INFO L225 Difference]: With dead ends: 2174 [2020-10-27 18:48:56,839 INFO L226 Difference]: Without dead ends: 1473 [2020-10-27 18:48:56,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:48:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-10-27 18:48:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1444. [2020-10-27 18:48:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-10-27 18:48:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2113 transitions. [2020-10-27 18:48:57,069 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2113 transitions. Word has length 34 [2020-10-27 18:48:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:57,071 INFO L481 AbstractCegarLoop]: Abstraction has 1444 states and 2113 transitions. [2020-10-27 18:48:57,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:48:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2113 transitions. [2020-10-27 18:48:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 18:48:57,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:57,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:48:57,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:48:57,081 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1595204042, now seen corresponding path program 1 times [2020-10-27 18:48:57,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:57,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884079048] [2020-10-27 18:48:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:57,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:57,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:58,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:58,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 18:48:58,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:48:58,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1382 [2020-10-27 18:48:58,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 18:48:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:48:58,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 18:48:58,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:48:58,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:58,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:58,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:58,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:58,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 18:48:58,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:58,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:48:58,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:58,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:58,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:58,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:59,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:59,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:48:59,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:48:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-27 18:48:59,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:48:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 18:48:59,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 18:48:59,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884079048] [2020-10-27 18:48:59,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:59,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:59,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45322845] [2020-10-27 18:48:59,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:48:59,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:48:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:48:59,350 INFO L87 Difference]: Start difference. First operand 1444 states and 2113 transitions. Second operand 6 states. [2020-10-27 18:49:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:12,514 INFO L93 Difference]: Finished difference Result 2902 states and 4246 transitions. [2020-10-27 18:49:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 18:49:12,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-27 18:49:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:12,529 INFO L225 Difference]: With dead ends: 2902 [2020-10-27 18:49:12,529 INFO L226 Difference]: Without dead ends: 1464 [2020-10-27 18:49:12,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:49:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2020-10-27 18:49:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2020-10-27 18:49:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2020-10-27 18:49:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2037 transitions. [2020-10-27 18:49:12,587 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2037 transitions. Word has length 105 [2020-10-27 18:49:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:12,588 INFO L481 AbstractCegarLoop]: Abstraction has 1464 states and 2037 transitions. [2020-10-27 18:49:12,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:49:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2037 transitions. [2020-10-27 18:49:12,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 18:49:12,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:12,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:12,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:49:12,591 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:12,592 INFO L82 PathProgramCache]: Analyzing trace with hash 964249751, now seen corresponding path program 1 times [2020-10-27 18:49:12,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:12,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502893872] [2020-10-27 18:49:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:12,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:12,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:12,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 18:49:12,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-27 18:49:12,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:49:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:49:12,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:13,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:13,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:13,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:13,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:13,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:13,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:49:13,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:13,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:13,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:13,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:13,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:13,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:49:13,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:13,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 18:49:13,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:13,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:13,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:49:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:49:13,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502893872] [2020-10-27 18:49:13,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:13,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:13,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105440114] [2020-10-27 18:49:13,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:13,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:13,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:13,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:13,310 INFO L87 Difference]: Start difference. First operand 1464 states and 2037 transitions. Second operand 5 states. [2020-10-27 18:49:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:26,654 INFO L93 Difference]: Finished difference Result 2945 states and 4456 transitions. [2020-10-27 18:49:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:26,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-27 18:49:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:26,667 INFO L225 Difference]: With dead ends: 2945 [2020-10-27 18:49:26,668 INFO L226 Difference]: Without dead ends: 1920 [2020-10-27 18:49:26,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-10-27 18:49:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1918. [2020-10-27 18:49:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 18:49:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2632 transitions. [2020-10-27 18:49:26,735 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2632 transitions. Word has length 108 [2020-10-27 18:49:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:26,735 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2632 transitions. [2020-10-27 18:49:26,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2632 transitions. [2020-10-27 18:49:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 18:49:26,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:26,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:26,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:49:26,741 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:26,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1426152057, now seen corresponding path program 1 times [2020-10-27 18:49:26,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:26,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860354459] [2020-10-27 18:49:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:26,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:26,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:27,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:29,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:31,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:31,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 18:49:31,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:49:31,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 18:49:31,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 18:49:31,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 18:49:31,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:49:32,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:32,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:32,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:32,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:49:32,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:32,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:32,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:32,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:32,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:32,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:32,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:49:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-27 18:49:32,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 18:49:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:32,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 18:49:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:32,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:32,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:32,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 18:49:32,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:32,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 18:49:32,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:49:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:49:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:49:32,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860354459] [2020-10-27 18:49:32,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:32,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:49:32,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146307343] [2020-10-27 18:49:32,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:49:32,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:49:32,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:49:32,484 INFO L87 Difference]: Start difference. First operand 1918 states and 2632 transitions. Second operand 7 states. [2020-10-27 18:49:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:47,418 INFO L93 Difference]: Finished difference Result 4827 states and 6972 transitions. [2020-10-27 18:49:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:49:47,424 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-10-27 18:49:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:47,444 INFO L225 Difference]: With dead ends: 4827 [2020-10-27 18:49:47,444 INFO L226 Difference]: Without dead ends: 2888 [2020-10-27 18:49:47,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:49:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2020-10-27 18:49:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2392. [2020-10-27 18:49:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2392 states. [2020-10-27 18:49:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 2941 transitions. [2020-10-27 18:49:47,554 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 2941 transitions. Word has length 181 [2020-10-27 18:49:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:47,555 INFO L481 AbstractCegarLoop]: Abstraction has 2392 states and 2941 transitions. [2020-10-27 18:49:47,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:49:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 2941 transitions. [2020-10-27 18:49:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 18:49:47,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:47,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:47,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:49:47,561 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash -647633594, now seen corresponding path program 1 times [2020-10-27 18:49:47,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:47,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309298776] [2020-10-27 18:49:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:47,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:48,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:48,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:48,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 18:49:48,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:48,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-27 18:49:48,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:48,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:48,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 18:49:48,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:49:48,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:49,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:49,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:49,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:49,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:49,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:49,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:49:49,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:49,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:49,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:49,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:49,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:49,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:49,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:49,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:49,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:49:49,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:49,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:49:49,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:49,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:49,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:49,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:49,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 18:49:49,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:49:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:49,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:49,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:49,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 18:49:49,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:49,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:49:49,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:49:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-27 18:49:49,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309298776] [2020-10-27 18:49:49,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:49,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:49:49,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385756902] [2020-10-27 18:49:49,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:49:49,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:49:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:49,486 INFO L87 Difference]: Start difference. First operand 2392 states and 2941 transitions. Second operand 6 states. [2020-10-27 18:50:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:04,457 INFO L93 Difference]: Finished difference Result 5227 states and 6640 transitions. [2020-10-27 18:50:04,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:04,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2020-10-27 18:50:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:04,478 INFO L225 Difference]: With dead ends: 5227 [2020-10-27 18:50:04,479 INFO L226 Difference]: Without dead ends: 2841 [2020-10-27 18:50:04,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:50:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2020-10-27 18:50:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2827. [2020-10-27 18:50:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-10-27 18:50:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3667 transitions. [2020-10-27 18:50:04,603 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3667 transitions. Word has length 194 [2020-10-27 18:50:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:04,604 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 3667 transitions. [2020-10-27 18:50:04,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:50:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3667 transitions. [2020-10-27 18:50:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-27 18:50:04,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:04,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:04,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:50:04,609 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash -109964574, now seen corresponding path program 1 times [2020-10-27 18:50:04,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:04,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102689041] [2020-10-27 18:50:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:04,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:04,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:07,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:08,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:08,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-27 18:50:08,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:50:08,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4212 [2020-10-27 18:50:08,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:08,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 18:50:08,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 18:50:08,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:09,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:09,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:09,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:09,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:09,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:09,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:50:09,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:09,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:09,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:09,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:09,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:09,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:09,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:50:09,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:09,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 18:50:09,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:09,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:09,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:09,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:09,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:09,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:50:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:09,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:09,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:09,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:50:09,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:09,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 18:50:09,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:09,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:09,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:50:09,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:50:09,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102689041] [2020-10-27 18:50:09,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:09,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:09,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882332399] [2020-10-27 18:50:09,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:09,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:09,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:09,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:09,566 INFO L87 Difference]: Start difference. First operand 2827 states and 3667 transitions. Second operand 5 states. [2020-10-27 18:50:10,794 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 18:50:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:20,107 INFO L93 Difference]: Finished difference Result 5678 states and 7370 transitions. [2020-10-27 18:50:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:20,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2020-10-27 18:50:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:20,130 INFO L225 Difference]: With dead ends: 5678 [2020-10-27 18:50:20,131 INFO L226 Difference]: Without dead ends: 2841 [2020-10-27 18:50:20,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2020-10-27 18:50:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2827. [2020-10-27 18:50:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2827 states. [2020-10-27 18:50:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 3664 transitions. [2020-10-27 18:50:20,227 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 3664 transitions. Word has length 196 [2020-10-27 18:50:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:20,228 INFO L481 AbstractCegarLoop]: Abstraction has 2827 states and 3664 transitions. [2020-10-27 18:50:20,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 3664 transitions. [2020-10-27 18:50:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-27 18:50:20,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:20,232 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:20,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:50:20,232 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2077153766, now seen corresponding path program 1 times [2020-10-27 18:50:20,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:20,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667889938] [2020-10-27 18:50:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:20,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-27 18:50:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:50:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-27 18:50:21,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-27 18:50:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:50:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:50:21,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:21,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:21,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:21,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:21,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:50:21,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:21,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:21,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:21,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:21,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:21,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:21,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:50:21,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:21,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 18:50:21,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:21,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:50:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:21,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:21,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:21,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 18:50:21,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:21,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:50:21,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:21,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:50:21,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 18:50:21,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667889938] [2020-10-27 18:50:21,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:21,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:21,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126470398] [2020-10-27 18:50:21,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:21,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:21,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:21,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:21,880 INFO L87 Difference]: Start difference. First operand 2827 states and 3664 transitions. Second operand 5 states. [2020-10-27 18:50:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:40,961 INFO L93 Difference]: Finished difference Result 7893 states and 10205 transitions. [2020-10-27 18:50:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:40,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2020-10-27 18:50:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:40,992 INFO L225 Difference]: With dead ends: 7893 [2020-10-27 18:50:40,993 INFO L226 Difference]: Without dead ends: 5072 [2020-10-27 18:50:41,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2020-10-27 18:50:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4178. [2020-10-27 18:50:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4178 states. [2020-10-27 18:50:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 5352 transitions. [2020-10-27 18:50:41,160 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 5352 transitions. Word has length 200 [2020-10-27 18:50:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:41,161 INFO L481 AbstractCegarLoop]: Abstraction has 4178 states and 5352 transitions. [2020-10-27 18:50:41,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 5352 transitions. [2020-10-27 18:50:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 18:50:41,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:41,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:41,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:50:41,166 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1928077928, now seen corresponding path program 1 times [2020-10-27 18:50:41,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:41,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106925646] [2020-10-27 18:50:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:41,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:46,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:46,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 18:50:46,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:50:46,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 18:50:46,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:46,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 18:50:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:50:46,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:50:46,439 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:50:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:46,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:46,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:46,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:46,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:46,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:50:46,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:46,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:46,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:46,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:46,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:46,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:46,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:46,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:46,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:50:46,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 18:50:46,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:46,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:46,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:46,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:46,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:46,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:50:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:46,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:46,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:46,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:50:46,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:46,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 18:50:46,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:46,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:46,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:50:46,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:50:46,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106925646] [2020-10-27 18:50:46,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:46,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:46,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930292268] [2020-10-27 18:50:46,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:46,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:46,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:46,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:46,878 INFO L87 Difference]: Start difference. First operand 4178 states and 5352 transitions. Second operand 5 states. [2020-10-27 18:51:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:02,190 INFO L93 Difference]: Finished difference Result 8354 states and 10709 transitions. [2020-10-27 18:51:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:51:02,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2020-10-27 18:51:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:02,215 INFO L225 Difference]: With dead ends: 8354 [2020-10-27 18:51:02,215 INFO L226 Difference]: Without dead ends: 4182 [2020-10-27 18:51:02,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:51:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-10-27 18:51:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 3743. [2020-10-27 18:51:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3743 states. [2020-10-27 18:51:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 4607 transitions. [2020-10-27 18:51:02,332 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 4607 transitions. Word has length 207 [2020-10-27 18:51:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:51:02,333 INFO L481 AbstractCegarLoop]: Abstraction has 3743 states and 4607 transitions. [2020-10-27 18:51:02,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:51:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 4607 transitions. [2020-10-27 18:51:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 18:51:02,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:02,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:51:02,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:51:02,337 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2107721420, now seen corresponding path program 1 times [2020-10-27 18:51:02,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:02,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561645769] [2020-10-27 18:51:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:02,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:02,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:03,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:03,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-27 18:51:03,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:51:03,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-10-27 18:51:03,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-27 18:51:03,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:51:03,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:03,550 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:51:03,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:03,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:03,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:03,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:03,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:03,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:51:03,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:03,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:03,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:03,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:03,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:03,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:03,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:51:03,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:03,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 18:51:03,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:03,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:03,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:03,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:03,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:51:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:03,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:03,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:03,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 18:51:03,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:03,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 18:51:03,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:03,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:03,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:03,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 18:51:03,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:51:03,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561645769] [2020-10-27 18:51:03,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:03,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:51:03,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53422402] [2020-10-27 18:51:03,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:51:03,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:03,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:51:03,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:51:03,950 INFO L87 Difference]: Start difference. First operand 3743 states and 4607 transitions. Second operand 5 states. [2020-10-27 18:51:04,107 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:51:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:25,656 INFO L93 Difference]: Finished difference Result 9759 states and 12178 transitions. [2020-10-27 18:51:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:51:25,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2020-10-27 18:51:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:25,697 INFO L225 Difference]: With dead ends: 9759 [2020-10-27 18:51:25,697 INFO L226 Difference]: Without dead ends: 6022 [2020-10-27 18:51:25,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:51:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6022 states. [2020-10-27 18:51:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6022 to 5129. [2020-10-27 18:51:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5129 states. [2020-10-27 18:51:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 6554 transitions. [2020-10-27 18:51:25,926 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 6554 transitions. Word has length 213 [2020-10-27 18:51:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:51:25,926 INFO L481 AbstractCegarLoop]: Abstraction has 5129 states and 6554 transitions. [2020-10-27 18:51:25,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:51:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 6554 transitions. [2020-10-27 18:51:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 18:51:25,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:25,933 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:51:25,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:51:25,934 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 917557018, now seen corresponding path program 1 times [2020-10-27 18:51:25,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:25,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291315850] [2020-10-27 18:51:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:26,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:26,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:27,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:27,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-27 18:51:27,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:51:27,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-27 18:51:27,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 194 [2020-10-27 18:51:27,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 18:51:27,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:27,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:27,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:27,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:27,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:27,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:27,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 18:51:27,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:27,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:27,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:27,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:51:27,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:27,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 18:51:27,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:27,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:27,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:27,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:27,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:27,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:51:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:28,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:28,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:28,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:51:28,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:28,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 18:51:28,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:28,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 18:51:28,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:51:28,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291315850] [2020-10-27 18:51:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:51:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369776444] [2020-10-27 18:51:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:51:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:51:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:51:28,233 INFO L87 Difference]: Start difference. First operand 5129 states and 6554 transitions. Second operand 5 states. [2020-10-27 18:51:29,002 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 18:51:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:48,943 INFO L93 Difference]: Finished difference Result 12508 states and 16351 transitions. [2020-10-27 18:51:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:51:48,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 216 [2020-10-27 18:51:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:48,970 INFO L225 Difference]: With dead ends: 12508 [2020-10-27 18:51:48,970 INFO L226 Difference]: Without dead ends: 6482 [2020-10-27 18:51:48,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:51:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6482 states. [2020-10-27 18:51:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6482 to 6467. [2020-10-27 18:51:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6467 states. [2020-10-27 18:51:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6467 states to 6467 states and 8324 transitions. [2020-10-27 18:51:49,164 INFO L78 Accepts]: Start accepts. Automaton has 6467 states and 8324 transitions. Word has length 216 [2020-10-27 18:51:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:51:49,165 INFO L481 AbstractCegarLoop]: Abstraction has 6467 states and 8324 transitions. [2020-10-27 18:51:49,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:51:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6467 states and 8324 transitions. [2020-10-27 18:51:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-27 18:51:49,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:51:49,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:51:49,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:51:49,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:51:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:51:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1244860353, now seen corresponding path program 1 times [2020-10-27 18:51:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:51:49,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215464495] [2020-10-27 18:51:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:51:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:49,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:49,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:51,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:51,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-27 18:51:51,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:51:51,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2011 [2020-10-27 18:51:51,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:51:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 220 [2020-10-27 18:51:51,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 18:51:51,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:51,530 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:51:51,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:51:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:51,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:51,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:51,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:51:51,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:51,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:51:51,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:51,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:51,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:51,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:51:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:51,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:51,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:51,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:51:51,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:51,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 18:51:51,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:51:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:51,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:51:51,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:51,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:51:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:51:51,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:51:51,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:51:51,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 18:51:51,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:51:51,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 18:51:51,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:51:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:51:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:51:51,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 18:51:51,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:51:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:51:52,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215464495] [2020-10-27 18:51:52,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:51:52,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:51:52,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438416139] [2020-10-27 18:51:52,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:51:52,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:51:52,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:51:52,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:51:52,086 INFO L87 Difference]: Start difference. First operand 6467 states and 8324 transitions. Second operand 5 states. [2020-10-27 18:51:56,399 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 18:52:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:52:05,342 INFO L93 Difference]: Finished difference Result 12955 states and 16688 transitions. [2020-10-27 18:52:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:52:05,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2020-10-27 18:52:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:52:05,372 INFO L225 Difference]: With dead ends: 12955 [2020-10-27 18:52:05,372 INFO L226 Difference]: Without dead ends: 6471 [2020-10-27 18:52:05,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:52:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2020-10-27 18:52:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 6467. [2020-10-27 18:52:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6467 states. [2020-10-27 18:52:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6467 states to 6467 states and 8299 transitions. [2020-10-27 18:52:05,534 INFO L78 Accepts]: Start accepts. Automaton has 6467 states and 8299 transitions. Word has length 242 [2020-10-27 18:52:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:52:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 6467 states and 8299 transitions. [2020-10-27 18:52:05,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:52:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6467 states and 8299 transitions. [2020-10-27 18:52:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 18:52:05,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:52:05,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-10-27 18:52:05,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 18:52:05,542 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:52:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:52:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1794552306, now seen corresponding path program 1 times [2020-10-27 18:52:05,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:52:05,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251468612] [2020-10-27 18:52:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:52:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:07,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:08,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:08,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 18:52:08,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:52:08,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3097 [2020-10-27 18:52:08,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:08,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:52:08,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-10-27 18:52:08,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 18:52:08,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:08,905 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:52:08,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:52:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:08,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:08,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:08,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:52:08,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:08,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:52:08,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:52:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:52:08,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:52:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:09,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:09,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:52:09,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:09,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 18:52:09,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:52:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:09,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:52:09,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:09,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:52:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:09,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:09,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 18:52:09,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:09,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 18:52:09,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:52:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:52:09,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 18:52:09,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:09,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-10-27 18:52:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:52:09,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:52:09,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:52:09,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:52:09,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:52:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-27 18:52:09,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:52:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:52:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:52:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 18:52:09,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:52:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:52:09,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251468612] [2020-10-27 18:52:09,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:52:09,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:52:09,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329983237] [2020-10-27 18:52:09,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:52:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:52:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:52:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:52:09,415 INFO L87 Difference]: Start difference. First operand 6467 states and 8299 transitions. Second operand 7 states. [2020-10-27 18:52:10,432 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68