/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:10:43,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:10:43,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:10:43,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:10:43,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:10:43,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:10:43,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:10:43,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:10:43,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:10:43,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:10:43,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:10:43,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:10:43,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:10:43,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:10:43,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:10:43,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:10:43,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:10:43,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:10:43,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:10:43,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:10:43,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:10:43,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:10:43,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:10:43,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:10:43,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:10:43,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:10:43,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:10:43,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:10:43,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:10:43,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:10:43,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:10:43,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:10:43,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:10:43,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:10:43,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:10:43,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:10:43,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:10:43,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:10:43,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:10:43,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:10:43,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:10:43,210 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 00:10:43,242 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:10:43,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:10:43,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:10:43,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:10:43,246 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:10:43,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:10:43,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:10:43,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:10:43,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:10:43,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:10:43,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:10:43,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:10:43,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:10:43,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:10:43,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:10:43,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:10:43,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:10:43,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:10:43,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:10:43,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:10:43,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:10:43,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:10:43,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:10:43,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:10:43,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:10:43,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:10:43,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:10:43,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:10:43,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:10:43,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:10:43,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:10:43,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:10:43,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:10:43,783 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:10:43,784 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:10:43,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label23.c [2020-10-27 00:10:43,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc9c345f4/c2c40f351aba47aaa36fb20a7212a5d2/FLAGbd601af1b [2020-10-27 00:10:44,986 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:10:44,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label23.c [2020-10-27 00:10:45,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc9c345f4/c2c40f351aba47aaa36fb20a7212a5d2/FLAGbd601af1b [2020-10-27 00:10:45,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fc9c345f4/c2c40f351aba47aaa36fb20a7212a5d2 [2020-10-27 00:10:45,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:10:45,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:10:45,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:10:45,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:10:45,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:10:45,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:10:45" (1/1) ... [2020-10-27 00:10:45,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb12977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:45, skipping insertion in model container [2020-10-27 00:10:45,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:10:45" (1/1) ... [2020-10-27 00:10:45,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:10:45,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:10:46,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:10:46,655 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:10:47,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:10:47,160 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:10:47,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47 WrapperNode [2020-10-27 00:10:47,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:10:47,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:10:47,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:10:47,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:10:47,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (1/1) ... [2020-10-27 00:10:47,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:10:47,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:10:47,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:10:47,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:10:47,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (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 00:10:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:10:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:10:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:10:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:10:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:10:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:10:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:10:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:10:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:10:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:10:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:10:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:10:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:10:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:10:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:10:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:10:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:10:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:10:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:10:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:10:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:10:57,606 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:10:57,607 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:10:57,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:10:57 BoogieIcfgContainer [2020-10-27 00:10:57,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:10:57,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:10:57,614 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:10:57,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:10:57,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:10:45" (1/3) ... [2020-10-27 00:10:57,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1714bac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:10:57, skipping insertion in model container [2020-10-27 00:10:57,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:10:47" (2/3) ... [2020-10-27 00:10:57,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1714bac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:10:57, skipping insertion in model container [2020-10-27 00:10:57,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:10:57" (3/3) ... [2020-10-27 00:10:57,624 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label23.c [2020-10-27 00:10:57,641 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:10:57,650 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:10:57,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:10:57,708 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:10:57,708 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:10:57,708 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:10:57,708 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:10:57,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:10:57,709 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:10:57,709 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:10:57,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:10:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:10:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 00:10:57,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:10:57,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:10:57,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:10:57,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:10:57,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1837291666, now seen corresponding path program 1 times [2020-10-27 00:10:57,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:10:57,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265915270] [2020-10-27 00:10:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:10:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:58,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:58,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:58,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 00:10:58,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:58,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 00:10:58,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:58,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:10:58,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:10:58,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 00:10:58,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:10:58,963 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:10:58,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:10:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:10:58,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:10:59,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:10:59,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:10:59,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:10:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 00:10:59,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:10:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:10:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:10:59,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:10:59,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:10:59,074 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 00:10:59,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265915270] [2020-10-27 00:10:59,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:10:59,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:10:59,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423144997] [2020-10-27 00:10:59,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:10:59,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:10:59,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:10:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:10:59,115 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:11:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:14,715 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:11:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:11:14,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 00:11:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:14,762 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:11:14,762 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:11:14,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:11:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:11:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:11:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:11:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:11:14,988 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 28 [2020-10-27 00:11:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:14,989 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:11:14,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:11:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:11:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 00:11:14,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:14,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:15,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:11:15,000 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:15,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:15,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2116326834, now seen corresponding path program 1 times [2020-10-27 00:11:15,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:15,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213472507] [2020-10-27 00:11:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:15,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:15,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:16,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:16,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 00:11:16,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:11:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-10-27 00:11:16,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:11:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:11:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:11:17,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:17,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:17,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:17,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:17,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:17,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:11:17,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:17,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:17,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:17,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:17,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:17,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:17,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:11:17,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:17,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 00:11:17,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:17,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:11:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:11:17,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213472507] [2020-10-27 00:11:17,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:17,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:11:17,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537952335] [2020-10-27 00:11:17,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:11:17,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:17,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:11:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:11:17,467 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 6 states. [2020-10-27 00:11:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:33,446 INFO L93 Difference]: Finished difference Result 2461 states and 3673 transitions. [2020-10-27 00:11:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:11:33,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-27 00:11:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:33,461 INFO L225 Difference]: With dead ends: 2461 [2020-10-27 00:11:33,461 INFO L226 Difference]: Without dead ends: 1464 [2020-10-27 00:11:33,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:11:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2020-10-27 00:11:33,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2020-10-27 00:11:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2020-10-27 00:11:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2036 transitions. [2020-10-27 00:11:33,535 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2036 transitions. Word has length 99 [2020-10-27 00:11:33,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:33,537 INFO L481 AbstractCegarLoop]: Abstraction has 1464 states and 2036 transitions. [2020-10-27 00:11:33,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:11:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2036 transitions. [2020-10-27 00:11:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 00:11:33,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:33,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:33,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:11:33,550 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:33,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1670614399, now seen corresponding path program 1 times [2020-10-27 00:11:33,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:33,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415933513] [2020-10-27 00:11:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:33,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:33,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:33,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 00:11:33,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:33,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 00:11:33,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:33,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:11:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 00:11:33,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:34,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:34,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:34,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:34,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:34,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:11:34,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:34,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:11:34,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:34,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:11:34,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:34,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:34,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:34,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:34,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:11:34,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:34,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 00:11:34,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:34,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:11:34,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:11:34,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415933513] [2020-10-27 00:11:34,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:34,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:11:34,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138460316] [2020-10-27 00:11:34,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:11:34,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:34,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:11:34,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:11:34,506 INFO L87 Difference]: Start difference. First operand 1464 states and 2036 transitions. Second operand 5 states. [2020-10-27 00:11:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:11:53,061 INFO L93 Difference]: Finished difference Result 2945 states and 4453 transitions. [2020-10-27 00:11:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:11:53,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-27 00:11:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:11:53,075 INFO L225 Difference]: With dead ends: 2945 [2020-10-27 00:11:53,075 INFO L226 Difference]: Without dead ends: 1920 [2020-10-27 00:11:53,079 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 00:11:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-10-27 00:11:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1918. [2020-10-27 00:11:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 00:11:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2630 transitions. [2020-10-27 00:11:53,182 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2630 transitions. Word has length 102 [2020-10-27 00:11:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:11:53,183 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2630 transitions. [2020-10-27 00:11:53,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:11:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2630 transitions. [2020-10-27 00:11:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 00:11:53,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:11:53,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:11:53,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:11:53,196 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:11:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:11:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash 412945921, now seen corresponding path program 1 times [2020-10-27 00:11:53,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:11:53,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295752629] [2020-10-27 00:11:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:11:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:53,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:53,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:53,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:55,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:58,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:58,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 00:11:58,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:11:58,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 00:11:58,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:58,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:11:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:11:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:11:58,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:58,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:11:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:58,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:58,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:11:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:11:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:11:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:11:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:11:58,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:58,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:11:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:58,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:58,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:58,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:11:58,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:11:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-27 00:11:58,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:11:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:11:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:59,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 00:11:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:11:59,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:11:59,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:11:59,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:11:59,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:11:59,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 00:11:59,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:11:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:11:59,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:11:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:11:59,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:11:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 65 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:11:59,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295752629] [2020-10-27 00:11:59,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:11:59,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:11:59,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368111802] [2020-10-27 00:11:59,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:11:59,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:11:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:11:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:11:59,846 INFO L87 Difference]: Start difference. First operand 1918 states and 2630 transitions. Second operand 9 states. [2020-10-27 00:12:00,116 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-27 00:12:00,822 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 00:12:01,024 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 00:12:01,785 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 00:12:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:23,831 INFO L93 Difference]: Finished difference Result 3507 states and 4981 transitions. [2020-10-27 00:12:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:12:23,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2020-10-27 00:12:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:23,847 INFO L225 Difference]: With dead ends: 3507 [2020-10-27 00:12:23,847 INFO L226 Difference]: Without dead ends: 1956 [2020-10-27 00:12:23,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-27 00:12:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-10-27 00:12:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1918. [2020-10-27 00:12:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 00:12:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2612 transitions. [2020-10-27 00:12:23,934 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2612 transitions. Word has length 175 [2020-10-27 00:12:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:23,935 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2612 transitions. [2020-10-27 00:12:23,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:12:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2612 transitions. [2020-10-27 00:12:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-27 00:12:23,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:23,939 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:12:23,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:12:23,939 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1933819442, now seen corresponding path program 1 times [2020-10-27 00:12:23,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:23,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448507211] [2020-10-27 00:12:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:25,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:25,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-27 00:12:25,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:12:25,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1431 [2020-10-27 00:12:25,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:25,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:12:25,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:12:25,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:12:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:25,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:25,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:25,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:25,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:25,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:12:25,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:25,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:12:25,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:25,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:12:25,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:25,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:25,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:25,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:25,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:25,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:25,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 00:12:25,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:25,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:25,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:12:25,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:12:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:25,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:26,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:26,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:12:26,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:26,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 00:12:26,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:26,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:26,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:12:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:12:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:12:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448507211] [2020-10-27 00:12:26,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:26,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:12:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91160464] [2020-10-27 00:12:26,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:12:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:12:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:12:26,145 INFO L87 Difference]: Start difference. First operand 1918 states and 2612 transitions. Second operand 7 states. [2020-10-27 00:12:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:12:45,831 INFO L93 Difference]: Finished difference Result 4833 states and 7041 transitions. [2020-10-27 00:12:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:12:45,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 188 [2020-10-27 00:12:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:12:45,852 INFO L225 Difference]: With dead ends: 4833 [2020-10-27 00:12:45,853 INFO L226 Difference]: Without dead ends: 3354 [2020-10-27 00:12:45,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:12:45,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2020-10-27 00:12:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3320. [2020-10-27 00:12:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3320 states. [2020-10-27 00:12:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4447 transitions. [2020-10-27 00:12:45,966 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4447 transitions. Word has length 188 [2020-10-27 00:12:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:12:45,967 INFO L481 AbstractCegarLoop]: Abstraction has 3320 states and 4447 transitions. [2020-10-27 00:12:45,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:12:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4447 transitions. [2020-10-27 00:12:45,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 00:12:45,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:12:45,970 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 00:12:45,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:12:45,971 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:12:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:12:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1939657834, now seen corresponding path program 1 times [2020-10-27 00:12:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:12:45,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354102506] [2020-10-27 00:12:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:12:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:46,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:50,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:50,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4477 [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 00:12:50,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:50,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:12:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:50,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:50,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:50,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:12:50,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:50,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:12:50,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:12:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:12:50,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:12:50,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:50,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:12:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:51,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:51,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:12:51,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:12:51,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 00:12:51,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:12:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:51,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:12:51,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:51,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:12:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:12:51,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:51,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:12:51,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:12:51,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:12:51,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:12:51,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-27 00:12:51,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:12:51,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:12:51,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:12:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:12:51,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:12:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:12:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354102506] [2020-10-27 00:12:51,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:12:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:12:51,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538864710] [2020-10-27 00:12:51,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:12:51,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:12:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:12:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:12:51,738 INFO L87 Difference]: Start difference. First operand 3320 states and 4447 transitions. Second operand 9 states. [2020-10-27 00:12:56,021 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:13:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:13,856 INFO L93 Difference]: Finished difference Result 8995 states and 12539 transitions. [2020-10-27 00:13:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:13:13,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 190 [2020-10-27 00:13:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:13,889 INFO L225 Difference]: With dead ends: 8995 [2020-10-27 00:13:13,890 INFO L226 Difference]: Without dead ends: 6119 [2020-10-27 00:13:13,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:13:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2020-10-27 00:13:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 6068. [2020-10-27 00:13:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6068 states. [2020-10-27 00:13:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 7651 transitions. [2020-10-27 00:13:14,065 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 7651 transitions. Word has length 190 [2020-10-27 00:13:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:14,066 INFO L481 AbstractCegarLoop]: Abstraction has 6068 states and 7651 transitions. [2020-10-27 00:13:14,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:13:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 7651 transitions. [2020-10-27 00:13:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-27 00:13:14,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:14,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:13:14,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:13:14,070 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:14,070 INFO L82 PathProgramCache]: Analyzing trace with hash -381765728, now seen corresponding path program 1 times [2020-10-27 00:13:14,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:14,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916906160] [2020-10-27 00:13:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:14,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:14,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:19,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:19,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-27 00:13:19,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:13:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 00:13:19,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:13:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:13:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 00:13:19,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:19,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:19,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:19,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:19,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:19,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:13:19,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:13:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:13:19,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:19,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:19,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:19,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:19,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:19,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:19,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 00:13:19,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:19,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:19,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:19,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:13:19,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:19,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:19,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:19,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:19,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:13:19,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:13:19,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 00:13:19,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:19,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:13:19,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 101 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:13:19,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916906160] [2020-10-27 00:13:19,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:19,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:13:19,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568404974] [2020-10-27 00:13:19,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:13:19,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:19,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:13:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:13:19,800 INFO L87 Difference]: Start difference. First operand 6068 states and 7651 transitions. Second operand 6 states. [2020-10-27 00:13:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:13:38,316 INFO L93 Difference]: Finished difference Result 14462 states and 19263 transitions. [2020-10-27 00:13:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:13:38,318 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 201 [2020-10-27 00:13:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:13:38,366 INFO L225 Difference]: With dead ends: 14462 [2020-10-27 00:13:38,366 INFO L226 Difference]: Without dead ends: 8840 [2020-10-27 00:13:38,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:13:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8840 states. [2020-10-27 00:13:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8840 to 8760. [2020-10-27 00:13:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8760 states. [2020-10-27 00:13:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 11459 transitions. [2020-10-27 00:13:38,730 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 11459 transitions. Word has length 201 [2020-10-27 00:13:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:13:38,731 INFO L481 AbstractCegarLoop]: Abstraction has 8760 states and 11459 transitions. [2020-10-27 00:13:38,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:13:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 11459 transitions. [2020-10-27 00:13:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 00:13:38,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:13:38,739 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:13:38,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:13:38,739 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:13:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:13:38,740 INFO L82 PathProgramCache]: Analyzing trace with hash -173163804, now seen corresponding path program 1 times [2020-10-27 00:13:38,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:13:38,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940113133] [2020-10-27 00:13:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:13:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:38,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:39,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:40,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:42,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:42,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-27 00:13:42,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:13:42,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3345 [2020-10-27 00:13:42,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:13:42,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:13:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-27 00:13:42,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:42,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:13:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:42,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:42,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:42,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:13:42,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:42,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:13:42,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:13:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:13:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:13:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:42,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:13:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:42,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:42,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:42,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:13:42,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:42,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-27 00:13:42,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:42,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:13:42,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:42,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:13:42,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:42,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:13:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:42,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:42,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:42,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:13:42,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:42,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 00:13:42,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:42,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:13:42,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:43,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:13:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:13:43,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:13:43,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:13:43,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:13:43,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:13:43,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 00:13:43,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:13:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:13:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:13:43,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:13:43,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:13:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 143 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:13:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940113133] [2020-10-27 00:13:43,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:13:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:13:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084563649] [2020-10-27 00:13:43,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:13:43,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:13:43,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:13:43,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:13:43,425 INFO L87 Difference]: Start difference. First operand 8760 states and 11459 transitions. Second operand 9 states. [2020-10-27 00:14:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:08,804 INFO L93 Difference]: Finished difference Result 21445 states and 31991 transitions. [2020-10-27 00:14:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 00:14:08,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 272 [2020-10-27 00:14:08,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:08,893 INFO L225 Difference]: With dead ends: 21445 [2020-10-27 00:14:08,893 INFO L226 Difference]: Without dead ends: 13133 [2020-10-27 00:14:08,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 00:14:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13133 states. [2020-10-27 00:14:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13133 to 10615. [2020-10-27 00:14:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10615 states. [2020-10-27 00:14:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 13673 transitions. [2020-10-27 00:14:09,423 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 13673 transitions. Word has length 272 [2020-10-27 00:14:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:09,424 INFO L481 AbstractCegarLoop]: Abstraction has 10615 states and 13673 transitions. [2020-10-27 00:14:09,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:14:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 13673 transitions. [2020-10-27 00:14:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-27 00:14:09,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:09,432 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:09,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:14:09,433 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:09,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1747215672, now seen corresponding path program 1 times [2020-10-27 00:14:09,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:09,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274742348] [2020-10-27 00:14:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:09,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:09,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:11,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1866 [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:14:11,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-27 00:14:11,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:11,558 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:14:11,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:11,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:11,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:11,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:11,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:11,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:14:11,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:14:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:14:11,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:11,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:11,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:11,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:11,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:14:11,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:11,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 00:14:11,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:14:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:11,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:14:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:11,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:11,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:12,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:12,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:14:12,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:14:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 00:14:12,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:14:12,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:12,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:14:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:12,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:12,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 00:14:12,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:12,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 00:14:12,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:12,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:14:12,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 287 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:14:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274742348] [2020-10-27 00:14:12,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:14:12,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:14:12,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145904988] [2020-10-27 00:14:12,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:14:12,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:12,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:14:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:14:12,628 INFO L87 Difference]: Start difference. First operand 10615 states and 13673 transitions. Second operand 8 states. [2020-10-27 00:14:13,595 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:14:24,522 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66