/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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:01:03,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:01:03,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:01:03,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:01:03,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:01:03,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:01:03,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:01:03,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:01:03,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:01:03,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:01:03,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:01:03,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:01:03,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:01:03,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:01:03,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:01:04,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:01:04,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:01:04,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:01:04,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:01:04,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:01:04,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:01:04,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:01:04,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:01:04,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:01:04,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:01:04,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:01:04,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:01:04,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:01:04,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:01:04,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:01:04,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:01:04,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:01:04,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:01:04,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:01:04,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:01:04,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:01:04,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:01:04,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:01:04,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:01:04,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:01:04,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:01:04,060 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 19:01:04,139 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:01:04,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:01:04,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:01:04,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:01:04,146 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:01:04,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:01:04,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:01:04,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:01:04,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:01:04,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:01:04,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:01:04,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:01:04,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:01:04,149 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:01:04,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:01:04,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:01:04,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:01:04,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:01:04,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:01:04,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:01:04,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:01:04,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:01:04,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:01:04,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:01:04,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:01:04,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:01:04,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:01:04,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:01:04,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:01:04,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:01:04,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:01:04,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:01:04,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:01:04,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:01:04,659 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:01:04,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label52.c [2020-10-27 19:01:04,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/444e2c3e4/e7e9c26a62154be9992ea1622f327abc/FLAG447c37b90 [2020-10-27 19:01:05,754 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:01:05,755 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label52.c [2020-10-27 19:01:05,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/444e2c3e4/e7e9c26a62154be9992ea1622f327abc/FLAG447c37b90 [2020-10-27 19:01:06,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/444e2c3e4/e7e9c26a62154be9992ea1622f327abc [2020-10-27 19:01:06,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:01:06,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:01:06,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:01:06,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:01:06,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:01:06,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:01:06" (1/1) ... [2020-10-27 19:01:06,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9f2d0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:06, skipping insertion in model container [2020-10-27 19:01:06,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:01:06" (1/1) ... [2020-10-27 19:01:06,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:01:06,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:01:07,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:01:07,676 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:01:08,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:01:08,301 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:01:08,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08 WrapperNode [2020-10-27 19:01:08,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:01:08,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:01:08,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:01:08,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:01:08,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (1/1) ... [2020-10-27 19:01:08,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:01:08,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:01:08,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:01:08,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:01:08,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (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 19:01:08,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:01:08,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:01:08,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:01:08,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:01:08,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:01:08,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:01:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:01:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:01:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:01:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:01:08,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:01:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:01:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:01:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:01:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:01:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:01:08,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:01:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:01:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:01:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:01:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:01:18,212 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:01:18,213 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:01:18,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:01:18 BoogieIcfgContainer [2020-10-27 19:01:18,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:01:18,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:01:18,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:01:18,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:01:18,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:01:06" (1/3) ... [2020-10-27 19:01:18,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cad1830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:01:18, skipping insertion in model container [2020-10-27 19:01:18,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:01:08" (2/3) ... [2020-10-27 19:01:18,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cad1830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:01:18, skipping insertion in model container [2020-10-27 19:01:18,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:01:18" (3/3) ... [2020-10-27 19:01:18,230 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label52.c [2020-10-27 19:01:18,243 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:01:18,251 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:01:18,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:01:18,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:01:18,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:01:18,303 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:01:18,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:01:18,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:01:18,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:01:18,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:01:18,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:01:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 19:01:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 19:01:18,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:01:18,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:01:18,345 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:01:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:01:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1136571011, now seen corresponding path program 1 times [2020-10-27 19:01:18,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:01:18,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034541867] [2020-10-27 19:01:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:01:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:18,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:19,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:19,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:01:19,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:19,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-27 19:01:19,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:01:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:01:19,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:01:19,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:01:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:01:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:19,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:19,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:19,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:01:19,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 19:01:19,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:01:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:01:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:19,251 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 19:01:19,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034541867] [2020-10-27 19:01:19,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:01:19,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:01:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572359141] [2020-10-27 19:01:19,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:01:19,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:01:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:01:19,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:01:19,283 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 19:01:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:01:32,611 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 19:01:32,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:01:32,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 19:01:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:01:32,657 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 19:01:32,657 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 19:01:32,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:01:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 19:01:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 19:01:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 19:01:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 19:01:32,851 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 13 [2020-10-27 19:01:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:01:32,852 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 19:01:32,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:01:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 19:01:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 19:01:32,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:01:32,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:32,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:01:32,858 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:01:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:01:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash -760582750, now seen corresponding path program 1 times [2020-10-27 19:01:32,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:01:32,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761911469] [2020-10-27 19:01:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:01:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:32,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:33,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:34,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:34,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 19:01:34,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:01:34,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-27 19:01:34,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:34,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:01:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 19:01:34,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:01:34,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:01:34,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:01:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:34,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:34,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:01:34,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:34,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:01:34,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:34,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:01:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:34,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:01:34,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:34,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:01:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:34,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:34,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:34,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:01:34,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 19:01:34,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:01:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:01:34,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:01:34,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761911469] [2020-10-27 19:01:34,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:01:34,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:01:34,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404237333] [2020-10-27 19:01:34,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:01:34,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:01:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:01:34,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:01:34,433 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 5 states. [2020-10-27 19:01:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:01:53,771 INFO L93 Difference]: Finished difference Result 2886 states and 4481 transitions. [2020-10-27 19:01:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:01:53,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-27 19:01:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:01:53,788 INFO L225 Difference]: With dead ends: 2886 [2020-10-27 19:01:53,788 INFO L226 Difference]: Without dead ends: 1889 [2020-10-27 19:01:53,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 19:01:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2020-10-27 19:01:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1885. [2020-10-27 19:01:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-27 19:01:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2588 transitions. [2020-10-27 19:01:53,893 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2588 transitions. Word has length 84 [2020-10-27 19:01:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:01:53,894 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2588 transitions. [2020-10-27 19:01:53,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:01:53,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2588 transitions. [2020-10-27 19:01:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 19:01:53,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:01:53,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:01:53,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:01:53,903 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:01:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:01:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash -740134761, now seen corresponding path program 1 times [2020-10-27 19:01:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:01:53,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329870266] [2020-10-27 19:01:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:01:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:54,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:54,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:54,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 19:01:54,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:54,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 19:01:54,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:54,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:01:54,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 19:01:54,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:01:54,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:54,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:01:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:54,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:54,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:54,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:01:54,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:54,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:01:54,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:54,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:01:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:54,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:01:54,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:01:54,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:01:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:01:54,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:01:54,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:01:54,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:01:54,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:01:54,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 19:01:54,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:01:54,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:01:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:01:54,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 19:01:54,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:01:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:01:54,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329870266] [2020-10-27 19:01:54,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:01:54,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:01:54,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931493281] [2020-10-27 19:01:54,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:01:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:01:54,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:01:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:01:54,730 INFO L87 Difference]: Start difference. First operand 1885 states and 2588 transitions. Second operand 5 states. [2020-10-27 19:02:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:02:13,849 INFO L93 Difference]: Finished difference Result 4661 states and 6590 transitions. [2020-10-27 19:02:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:02:13,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-27 19:02:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:02:13,873 INFO L225 Difference]: With dead ends: 4661 [2020-10-27 19:02:13,873 INFO L226 Difference]: Without dead ends: 2782 [2020-10-27 19:02:13,879 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 19:02:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2020-10-27 19:02:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 2776. [2020-10-27 19:02:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-27 19:02:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 3666 transitions. [2020-10-27 19:02:14,003 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 3666 transitions. Word has length 87 [2020-10-27 19:02:14,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:02:14,004 INFO L481 AbstractCegarLoop]: Abstraction has 2776 states and 3666 transitions. [2020-10-27 19:02:14,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:02:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 3666 transitions. [2020-10-27 19:02:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 19:02:14,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:02:14,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:02:14,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:02:14,019 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:02:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:02:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1346334158, now seen corresponding path program 1 times [2020-10-27 19:02:14,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:02:14,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059964045] [2020-10-27 19:02:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:02:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:14,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:14,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:15,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 19:02:15,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:02:15,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-27 19:02:15,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:15,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:02:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 19:02:15,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:02:15,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 19:02:15,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:02:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:15,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:02:15,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 19:02:15,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:15,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:15,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:15,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:02:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:15,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:15,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:15,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:02:15,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:15,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 19:02:15,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:02:15,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:15,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 19:02:15,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:02:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:02:15,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059964045] [2020-10-27 19:02:15,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:02:15,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:02:15,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197073177] [2020-10-27 19:02:15,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:02:15,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:02:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:02:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:02:15,730 INFO L87 Difference]: Start difference. First operand 2776 states and 3666 transitions. Second operand 5 states. [2020-10-27 19:02:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:02:31,054 INFO L93 Difference]: Finished difference Result 6456 states and 8798 transitions. [2020-10-27 19:02:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:02:31,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-10-27 19:02:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:02:31,084 INFO L225 Difference]: With dead ends: 6456 [2020-10-27 19:02:31,084 INFO L226 Difference]: Without dead ends: 3686 [2020-10-27 19:02:31,091 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 19:02:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2020-10-27 19:02:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 3673. [2020-10-27 19:02:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3673 states. [2020-10-27 19:02:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 4864 transitions. [2020-10-27 19:02:31,221 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 4864 transitions. Word has length 92 [2020-10-27 19:02:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:02:31,222 INFO L481 AbstractCegarLoop]: Abstraction has 3673 states and 4864 transitions. [2020-10-27 19:02:31,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:02:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 4864 transitions. [2020-10-27 19:02:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-27 19:02:31,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:02:31,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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 19:02:31,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:02:31,233 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:02:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:02:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2130330819, now seen corresponding path program 1 times [2020-10-27 19:02:31,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:02:31,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134758149] [2020-10-27 19:02:31,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:02:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:31,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:33,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:33,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 19:02:33,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:02:33,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1730 [2020-10-27 19:02:33,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:02:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-27 19:02:33,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:02:33,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:02:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:33,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:02:33,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:02:33,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:33,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:02:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:33,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:33,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:33,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 19:02:33,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:33,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 19:02:33,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:33,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:02:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:33,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 19:02:33,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:02:33,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134758149] [2020-10-27 19:02:33,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:02:33,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:02:33,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188204750] [2020-10-27 19:02:33,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:02:33,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:02:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:02:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:02:33,463 INFO L87 Difference]: Start difference. First operand 3673 states and 4864 transitions. Second operand 5 states. [2020-10-27 19:02:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:02:53,516 INFO L93 Difference]: Finished difference Result 10852 states and 14618 transitions. [2020-10-27 19:02:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:02:53,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-10-27 19:02:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:02:53,561 INFO L225 Difference]: With dead ends: 10852 [2020-10-27 19:02:53,562 INFO L226 Difference]: Without dead ends: 7185 [2020-10-27 19:02:53,572 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 19:02:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7185 states. [2020-10-27 19:02:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7185 to 7181. [2020-10-27 19:02:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7181 states. [2020-10-27 19:02:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 9178 transitions. [2020-10-27 19:02:53,786 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 9178 transitions. Word has length 115 [2020-10-27 19:02:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:02:53,788 INFO L481 AbstractCegarLoop]: Abstraction has 7181 states and 9178 transitions. [2020-10-27 19:02:53,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:02:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 9178 transitions. [2020-10-27 19:02:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 19:02:53,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:02:53,794 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:02:53,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:02:53,795 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:02:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:02:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1990360406, now seen corresponding path program 1 times [2020-10-27 19:02:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:02:53,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406793835] [2020-10-27 19:02:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:02:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:53,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:54,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:55,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:58,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:58,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5119 [2020-10-27 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:58,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:02:58,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:59,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:02:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:59,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:59,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:59,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:02:59,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:02:59,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:59,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:59,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:59,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:02:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:59,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:59,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:59,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 19:02:59,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 19:02:59,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:02:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:59,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:02:59,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:59,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 19:02:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:02:59,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:02:59,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:02:59,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:02:59,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:02:59,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 19:02:59,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:02:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:02:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:02:59,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:02:59,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:02:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 19:02:59,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406793835] [2020-10-27 19:02:59,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:02:59,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:02:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371973736] [2020-10-27 19:02:59,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:02:59,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:02:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:02:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:02:59,486 INFO L87 Difference]: Start difference. First operand 7181 states and 9178 transitions. Second operand 5 states. [2020-10-27 19:03:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:03:16,614 INFO L93 Difference]: Finished difference Result 21405 states and 27985 transitions. [2020-10-27 19:03:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:03:16,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-27 19:03:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:03:16,690 INFO L225 Difference]: With dead ends: 21405 [2020-10-27 19:03:16,690 INFO L226 Difference]: Without dead ends: 14230 [2020-10-27 19:03:16,714 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 19:03:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2020-10-27 19:03:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 14202. [2020-10-27 19:03:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14202 states. [2020-10-27 19:03:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14202 states to 14202 states and 18152 transitions. [2020-10-27 19:03:17,119 INFO L78 Accepts]: Start accepts. Automaton has 14202 states and 18152 transitions. Word has length 162 [2020-10-27 19:03:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:03:17,120 INFO L481 AbstractCegarLoop]: Abstraction has 14202 states and 18152 transitions. [2020-10-27 19:03:17,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:03:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 14202 states and 18152 transitions. [2020-10-27 19:03:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 19:03:17,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:03:17,125 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 19:03:17,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:03:17,126 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:03:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:03:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1198264459, now seen corresponding path program 1 times [2020-10-27 19:03:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:03:17,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430627794] [2020-10-27 19:03:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:03:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:17,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:19,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:19,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:22,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:22,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 19:03:22,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:03:22,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 19:03:22,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:03:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 19:03:22,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:03:22,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:03:22,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:03:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:22,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:22,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:22,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:03:22,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:22,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:03:22,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:03:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:03:22,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:22,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:03:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:22,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:22,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:22,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:03:22,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:22,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:03:22,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:03:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:03:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:22,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-27 19:03:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:22,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:22,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:22,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 19:03:22,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 19:03:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:03:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 19:03:22,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:03:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-27 19:03:22,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430627794] [2020-10-27 19:03:22,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:03:22,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:03:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746807268] [2020-10-27 19:03:22,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:03:22,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:03:22,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:03:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:03:22,625 INFO L87 Difference]: Start difference. First operand 14202 states and 18152 transitions. Second operand 5 states. [2020-10-27 19:03:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:03:40,123 INFO L93 Difference]: Finished difference Result 34963 states and 45649 transitions. [2020-10-27 19:03:40,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:03:40,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-27 19:03:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:03:40,226 INFO L225 Difference]: With dead ends: 34963 [2020-10-27 19:03:40,227 INFO L226 Difference]: Without dead ends: 20767 [2020-10-27 19:03:40,266 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 19:03:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20767 states. [2020-10-27 19:03:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20767 to 16866. [2020-10-27 19:03:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16866 states. [2020-10-27 19:03:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16866 states to 16866 states and 22515 transitions. [2020-10-27 19:03:40,816 INFO L78 Accepts]: Start accepts. Automaton has 16866 states and 22515 transitions. Word has length 170 [2020-10-27 19:03:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:03:40,817 INFO L481 AbstractCegarLoop]: Abstraction has 16866 states and 22515 transitions. [2020-10-27 19:03:40,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:03:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16866 states and 22515 transitions. [2020-10-27 19:03:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 19:03:40,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:03:40,825 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 19:03:40,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:03:40,826 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:03:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:03:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1664821325, now seen corresponding path program 1 times [2020-10-27 19:03:40,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:03:40,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310967016] [2020-10-27 19:03:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:03:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:40,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:42,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:42,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:45,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:45,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 19:03:45,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:03:45,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 19:03:45,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:03:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-27 19:03:45,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:03:45,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:46,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:03:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:46,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:46,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:46,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:03:46,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:03:46,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:03:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:03:46,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:46,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:03:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:46,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:46,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:46,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:03:46,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:03:46,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 19:03:46,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:03:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:03:46,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:03:46,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:46,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-27 19:03:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:03:46,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:03:46,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:03:46,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:03:46,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:03:46,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 19:03:46,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:03:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:03:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-27 19:03:46,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:03:46,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:03:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-27 19:03:46,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310967016] [2020-10-27 19:03:46,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:03:46,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:03:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098989013] [2020-10-27 19:03:46,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:03:46,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:03:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:03:46,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:03:46,449 INFO L87 Difference]: Start difference. First operand 16866 states and 22515 transitions. Second operand 6 states. [2020-10-27 19:03:47,200 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:04:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:04:05,624 INFO L93 Difference]: Finished difference Result 41167 states and 57249 transitions. [2020-10-27 19:04:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:04:05,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 193 [2020-10-27 19:04:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:04:05,726 INFO L225 Difference]: With dead ends: 41167 [2020-10-27 19:04:05,726 INFO L226 Difference]: Without dead ends: 24307 [2020-10-27 19:04:05,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:04:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24307 states. [2020-10-27 19:04:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24307 to 24291. [2020-10-27 19:04:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24291 states. [2020-10-27 19:04:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24291 states to 24291 states and 32602 transitions. [2020-10-27 19:04:06,478 INFO L78 Accepts]: Start accepts. Automaton has 24291 states and 32602 transitions. Word has length 193 [2020-10-27 19:04:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:04:06,478 INFO L481 AbstractCegarLoop]: Abstraction has 24291 states and 32602 transitions. [2020-10-27 19:04:06,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:04:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 24291 states and 32602 transitions. [2020-10-27 19:04:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-27 19:04:06,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:04:06,489 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 19:04:06,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:04:06,490 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:04:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:04:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1440617778, now seen corresponding path program 1 times [2020-10-27 19:04:06,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:04:06,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144526478] [2020-10-27 19:04:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:04:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:06,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:06,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:09,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:09,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-27 19:04:09,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:04:09,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3253 [2020-10-27 19:04:09,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:09,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:04:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 228 [2020-10-27 19:04:09,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:04:09,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:09,968 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:04:09,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:04:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:09,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:09,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:09,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:04:09,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:09,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:04:09,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:09,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:10,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:04:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:10,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:10,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 19:04:10,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:10,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 19:04:10,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:10,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:04:10,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:10,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:04:10,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:10,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-27 19:04:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:10,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:10,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:10,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 19:04:10,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:04:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-27 19:04:10,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:04:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 19:04:10,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:04:10,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:04:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 19:04:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144526478] [2020-10-27 19:04:10,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:04:10,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:04:10,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177908258] [2020-10-27 19:04:10,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:04:10,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:04:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:04:10,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:04:10,584 INFO L87 Difference]: Start difference. First operand 24291 states and 32602 transitions. Second operand 6 states. [2020-10-27 19:04:11,518 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:04:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:04:45,926 INFO L93 Difference]: Finished difference Result 63085 states and 88615 transitions. [2020-10-27 19:04:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:04:45,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 230 [2020-10-27 19:04:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:04:46,114 INFO L225 Difference]: With dead ends: 63085 [2020-10-27 19:04:46,114 INFO L226 Difference]: Without dead ends: 38800 [2020-10-27 19:04:46,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:04:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38800 states. [2020-10-27 19:04:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38800 to 33583. [2020-10-27 19:04:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33583 states. [2020-10-27 19:04:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33583 states to 33583 states and 44907 transitions. [2020-10-27 19:04:47,135 INFO L78 Accepts]: Start accepts. Automaton has 33583 states and 44907 transitions. Word has length 230 [2020-10-27 19:04:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:04:47,136 INFO L481 AbstractCegarLoop]: Abstraction has 33583 states and 44907 transitions. [2020-10-27 19:04:47,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:04:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 33583 states and 44907 transitions. [2020-10-27 19:04:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 19:04:47,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:04:47,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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 19:04:47,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:04:47,155 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:04:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:04:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1309580781, now seen corresponding path program 1 times [2020-10-27 19:04:47,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:04:47,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413591074] [2020-10-27 19:04:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:04:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:47,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:47,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:47,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-27 19:04:47,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:47,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 682 [2020-10-27 19:04:47,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:47,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:04:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:04:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 248 [2020-10-27 19:04:47,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:48,393 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:04:48,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:04:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:48,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:48,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:48,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:04:48,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:48,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:04:48,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:48,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:04:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:04:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:04:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:48,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:04:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:04:48,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:04:48,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:04:48,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-27 19:04:48,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:04:48,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-27 19:04:48,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:04:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:04:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 19:04:48,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-27 19:04:48,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:04:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:04:49,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413591074] [2020-10-27 19:04:49,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:04:49,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:04:49,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440970132] [2020-10-27 19:04:49,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:04:49,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:04:49,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:04:49,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:04:49,498 INFO L87 Difference]: Start difference. First operand 33583 states and 44907 transitions. Second operand 7 states. [2020-10-27 19:04:49,680 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:04:54,723 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 67