/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/Problem15_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:39:56,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:39:56,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:39:56,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:39:56,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:39:56,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:39:56,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:39:56,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:39:56,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:39:56,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:39:56,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:39:56,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:39:56,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:39:56,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:39:56,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:39:56,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:39:56,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:39:56,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:39:56,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:39:56,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:39:56,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:39:56,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:39:56,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:39:56,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:39:56,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:39:56,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:39:56,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:39:56,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:39:56,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:39:56,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:39:56,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:39:56,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:39:56,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:39:56,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:39:56,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:39:56,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:39:56,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:39:56,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:39:56,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:39:56,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:39:56,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:39:56,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:39:56,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:39:56,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:39:56,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:39:56,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:39:56,311 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:39:56,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:39:56,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:39:56,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:39:56,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:39:56,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:39:56,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:39:56,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:39:56,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:39:56,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:39:56,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:39:56,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:39:56,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:39:56,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:39:56,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:39:56,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:39:56,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:39:56,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:39:56,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:39:56,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:39:56,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:39:56,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:39:56,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:39:56,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:39:56,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:39:56,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:39:56,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:39:56,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:39:56,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:39:56,793 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:39:56,794 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:39:56,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label22.c [2020-10-26 23:39:56,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/188dafbcf/122302a055de44e198abeaf4505f4cfa/FLAG6b41e008d [2020-10-26 23:39:57,936 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:39:57,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label22.c [2020-10-26 23:39:57,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/188dafbcf/122302a055de44e198abeaf4505f4cfa/FLAG6b41e008d [2020-10-26 23:39:58,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/188dafbcf/122302a055de44e198abeaf4505f4cfa [2020-10-26 23:39:58,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:39:58,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:39:58,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:39:58,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:39:58,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:39:58,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:58" (1/1) ... [2020-10-26 23:39:58,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d3348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:58, skipping insertion in model container [2020-10-26 23:39:58,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:58" (1/1) ... [2020-10-26 23:39:58,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:39:58,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:39:59,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:39:59,128 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:39:59,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:39:59,423 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:39:59,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59 WrapperNode [2020-10-26 23:39:59,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:39:59,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:39:59,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:39:59,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:39:59,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... [2020-10-26 23:39:59,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:39:59,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:39:59,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:39:59,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:39:59,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:39:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:39:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:39:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:39:59,794 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:39:59,794 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:39:59,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:39:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:39:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:39:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:39:59,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:39:59,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:40:03,646 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:40:03,646 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:40:03,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:40:03 BoogieIcfgContainer [2020-10-26 23:40:03,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:40:03,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:40:03,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:40:03,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:40:03,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:39:58" (1/3) ... [2020-10-26 23:40:03,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71669b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:40:03, skipping insertion in model container [2020-10-26 23:40:03,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:59" (2/3) ... [2020-10-26 23:40:03,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71669b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:40:03, skipping insertion in model container [2020-10-26 23:40:03,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:40:03" (3/3) ... [2020-10-26 23:40:03,660 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label22.c [2020-10-26 23:40:03,674 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:40:03,681 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:40:03,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:40:03,732 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:40:03,733 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:40:03,733 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:40:03,733 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:40:03,733 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:40:03,733 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:40:03,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:40:03,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:40:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:40:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 23:40:03,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:03,774 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] [2020-10-26 23:40:03,775 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:03,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1117149967, now seen corresponding path program 1 times [2020-10-26 23:40:03,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:03,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501824456] [2020-10-26 23:40:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:04,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:04,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:04,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 23:40:04,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-26 23:40:04,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:04,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:04,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 23:40:04,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:40:04,881 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:40:04,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:04,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:04,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:04,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:04,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 23:40:04,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:04,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:04,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:04,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:04,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501824456] [2020-10-26 23:40:04,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:04,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:40:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776096376] [2020-10-26 23:40:04,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:40:04,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:40:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:40:05,009 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:40:05,206 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:40:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:14,512 INFO L93 Difference]: Finished difference Result 1245 states and 2226 transitions. [2020-10-26 23:40:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:40:14,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 23:40:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:14,539 INFO L225 Difference]: With dead ends: 1245 [2020-10-26 23:40:14,539 INFO L226 Difference]: Without dead ends: 725 [2020-10-26 23:40:14,553 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 [2020-10-26 23:40:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-26 23:40:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2020-10-26 23:40:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-26 23:40:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1130 transitions. [2020-10-26 23:40:14,707 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1130 transitions. Word has length 25 [2020-10-26 23:40:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:14,708 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1130 transitions. [2020-10-26 23:40:14,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:40:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1130 transitions. [2020-10-26 23:40:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 23:40:14,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:14,719 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-26 23:40:14,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:40:14,719 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash -633446725, now seen corresponding path program 1 times [2020-10-26 23:40:14,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:14,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211175194] [2020-10-26 23:40:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:14,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:15,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:15,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 23:40:15,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:15,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-26 23:40:15,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:15,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:15,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:15,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 23:40:15,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:15,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:15,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:15,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:15,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:15,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:15,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:40:15,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:15,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:15,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:15,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:15,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:16,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:16,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:40:16,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:16,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-26 23:40:16,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:16,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:40:16,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211175194] [2020-10-26 23:40:16,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:16,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:40:16,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532523364] [2020-10-26 23:40:16,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:16,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:16,287 INFO L87 Difference]: Start difference. First operand 713 states and 1130 transitions. Second operand 7 states. [2020-10-26 23:40:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:25,240 INFO L93 Difference]: Finished difference Result 2091 states and 3342 transitions. [2020-10-26 23:40:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:40:25,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-26 23:40:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:25,255 INFO L225 Difference]: With dead ends: 2091 [2020-10-26 23:40:25,255 INFO L226 Difference]: Without dead ends: 1384 [2020-10-26 23:40:25,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:40:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2020-10-26 23:40:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1342. [2020-10-26 23:40:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2020-10-26 23:40:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1857 transitions. [2020-10-26 23:40:25,358 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1857 transitions. Word has length 97 [2020-10-26 23:40:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:25,359 INFO L481 AbstractCegarLoop]: Abstraction has 1342 states and 1857 transitions. [2020-10-26 23:40:25,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:40:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1857 transitions. [2020-10-26 23:40:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 23:40:25,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:25,370 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:25,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:40:25,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1748007243, now seen corresponding path program 1 times [2020-10-26 23:40:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:25,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111772677] [2020-10-26 23:40:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:25,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:27,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:27,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 23:40:27,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:27,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1623 [2020-10-26 23:40:27,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:27,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:40:27,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:27,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:27,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:27,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:27,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:27,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:40:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:27,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:27,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:27,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:27,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:40:27,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:27,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-26 23:40:27,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:27,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:40:27,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:27,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111772677] [2020-10-26 23:40:27,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:27,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:40:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147427213] [2020-10-26 23:40:27,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:40:27,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:27,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:40:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:27,693 INFO L87 Difference]: Start difference. First operand 1342 states and 1857 transitions. Second operand 8 states. [2020-10-26 23:40:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:40,227 INFO L93 Difference]: Finished difference Result 3010 states and 4091 transitions. [2020-10-26 23:40:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:40:40,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2020-10-26 23:40:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:40,244 INFO L225 Difference]: With dead ends: 3010 [2020-10-26 23:40:40,244 INFO L226 Difference]: Without dead ends: 1674 [2020-10-26 23:40:40,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:40:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2020-10-26 23:40:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1650. [2020-10-26 23:40:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1650 states. [2020-10-26 23:40:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2175 transitions. [2020-10-26 23:40:40,327 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2175 transitions. Word has length 105 [2020-10-26 23:40:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:40,330 INFO L481 AbstractCegarLoop]: Abstraction has 1650 states and 2175 transitions. [2020-10-26 23:40:40,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:40:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2175 transitions. [2020-10-26 23:40:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-26 23:40:40,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:40,337 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:40,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:40:40,337 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1081141847, now seen corresponding path program 1 times [2020-10-26 23:40:40,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:40,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571791681] [2020-10-26 23:40:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:40,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:40,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:40,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:45,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:45,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-26 23:40:45,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:40:45,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 23:40:45,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:40:45,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-26 23:40:45,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:45,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:45,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:45,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:45,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:45,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:40:45,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:45,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:45,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:45,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:45,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:45,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:45,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:40:45,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:40:45,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-26 23:40:45,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:45,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:40:45,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:45,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:40:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:46,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:46,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:46,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:40:46,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-26 23:40:46,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:46,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:40:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 23:40:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:40:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571791681] [2020-10-26 23:40:46,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:40:46,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:40:46,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591844931] [2020-10-26 23:40:46,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:40:46,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:40:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:40:46,382 INFO L87 Difference]: Start difference. First operand 1650 states and 2175 transitions. Second operand 8 states. [2020-10-26 23:40:59,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:59,045 INFO L93 Difference]: Finished difference Result 4326 states and 5929 transitions. [2020-10-26 23:40:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 23:40:59,051 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-10-26 23:40:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:59,069 INFO L225 Difference]: With dead ends: 4326 [2020-10-26 23:40:59,069 INFO L226 Difference]: Without dead ends: 2989 [2020-10-26 23:40:59,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:40:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2020-10-26 23:40:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2926. [2020-10-26 23:40:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2926 states. [2020-10-26 23:40:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 3603 transitions. [2020-10-26 23:40:59,175 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 3603 transitions. Word has length 200 [2020-10-26 23:40:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:59,176 INFO L481 AbstractCegarLoop]: Abstraction has 2926 states and 3603 transitions. [2020-10-26 23:40:59,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:40:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 3603 transitions. [2020-10-26 23:40:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-26 23:40:59,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:59,182 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:59,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:40:59,183 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1375945531, now seen corresponding path program 1 times [2020-10-26 23:40:59,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:59,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429238018] [2020-10-26 23:40:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:59,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:00,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:01,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:01,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 23:41:01,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-26 23:41:01,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:41:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 314 [2020-10-26 23:41:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:01,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:01,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:01,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:01,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:01,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:01,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:41:01,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:01,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:01,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:01,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:01,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:01,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:02,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:02,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:02,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:02,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-26 23:41:02,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:02,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:02,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:02,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-26 23:41:02,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:41:02,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429238018] [2020-10-26 23:41:02,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:02,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:41:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151823846] [2020-10-26 23:41:02,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:41:02,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:02,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:41:02,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:41:02,637 INFO L87 Difference]: Start difference. First operand 2926 states and 3603 transitions. Second operand 6 states. [2020-10-26 23:41:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:11,429 INFO L93 Difference]: Finished difference Result 3585 states and 4387 transitions. [2020-10-26 23:41:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:41:11,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 311 [2020-10-26 23:41:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:11,455 INFO L225 Difference]: With dead ends: 3585 [2020-10-26 23:41:11,455 INFO L226 Difference]: Without dead ends: 3582 [2020-10-26 23:41:11,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:11,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2020-10-26 23:41:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3552. [2020-10-26 23:41:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3552 states. [2020-10-26 23:41:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 4341 transitions. [2020-10-26 23:41:11,566 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 4341 transitions. Word has length 311 [2020-10-26 23:41:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:11,567 INFO L481 AbstractCegarLoop]: Abstraction has 3552 states and 4341 transitions. [2020-10-26 23:41:11,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:41:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 4341 transitions. [2020-10-26 23:41:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-26 23:41:11,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:11,574 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:11,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:41:11,574 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:11,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1298067526, now seen corresponding path program 1 times [2020-10-26 23:41:11,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:11,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073349770] [2020-10-26 23:41:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:11,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:11,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:12,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:13,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:16,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:16,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-26 23:41:16,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:41:16,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 23:41:16,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:16,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:41:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:16,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 325 [2020-10-26 23:41:16,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:16,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:16,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:16,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:16,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:16,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:16,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:41:16,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:16,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:16,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:16,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:17,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:17,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:17,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:41:17,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:17,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-26 23:41:17,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:41:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:17,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:41:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:17,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:17,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:18,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:18,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:41:18,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:18,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1122 [2020-10-26 23:41:18,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:18,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:41:18,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:18,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:41:18,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:19,013 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-26 23:41:19,168 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-26 23:41:19,364 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-26 23:41:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 23:41:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073349770] [2020-10-26 23:41:20,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:20,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:41:20,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897589253] [2020-10-26 23:41:20,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 23:41:20,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:20,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 23:41:20,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:41:20,333 INFO L87 Difference]: Start difference. First operand 3552 states and 4341 transitions. Second operand 11 states. [2020-10-26 23:41:21,969 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-26 23:41:22,880 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-26 23:41:23,983 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-26 23:41:24,806 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-26 23:41:25,475 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-10-26 23:41:25,801 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-10-26 23:41:26,803 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-10-26 23:41:27,226 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-26 23:41:27,997 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-26 23:41:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:37,051 INFO L93 Difference]: Finished difference Result 5851 states and 7728 transitions. [2020-10-26 23:41:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 23:41:37,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 320 [2020-10-26 23:41:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:37,079 INFO L225 Difference]: With dead ends: 5851 [2020-10-26 23:41:37,079 INFO L226 Difference]: Without dead ends: 4483 [2020-10-26 23:41:37,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2020-10-26 23:41:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2020-10-26 23:41:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 3600. [2020-10-26 23:41:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3600 states. [2020-10-26 23:41:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4654 transitions. [2020-10-26 23:41:37,242 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4654 transitions. Word has length 320 [2020-10-26 23:41:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:37,243 INFO L481 AbstractCegarLoop]: Abstraction has 3600 states and 4654 transitions. [2020-10-26 23:41:37,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 23:41:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4654 transitions. [2020-10-26 23:41:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-10-26 23:41:37,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:37,258 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:37,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:41:37,258 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash -74563797, now seen corresponding path program 1 times [2020-10-26 23:41:37,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:37,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771611698] [2020-10-26 23:41:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:37,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:37,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:40,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:42,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:42,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-10-26 23:41:42,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:42,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 23:41:42,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:41:42,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 23:41:42,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:42,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:42,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:42,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:42,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:42,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 23:41:42,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:42,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:42,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:42,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:42,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:42,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:42,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:41:43,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:43,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-26 23:41:43,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:43,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:41:43,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:41:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:43,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:41:43,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:43,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 23:41:43,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:41:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-10-26 23:41:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:43,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:43,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:43,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:41:43,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:43,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 23:41:43,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:41:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-26 23:41:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:41:43,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 132 proven. 71 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 23:41:43,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771611698] [2020-10-26 23:41:43,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:43,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:41:43,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656133349] [2020-10-26 23:41:43,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:41:43,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:41:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:41:43,668 INFO L87 Difference]: Start difference. First operand 3600 states and 4654 transitions. Second operand 7 states. [2020-10-26 23:41:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:55,583 INFO L93 Difference]: Finished difference Result 8512 states and 11598 transitions. [2020-10-26 23:41:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:41:55,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 451 [2020-10-26 23:41:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:55,609 INFO L225 Difference]: With dead ends: 8512 [2020-10-26 23:41:55,609 INFO L226 Difference]: Without dead ends: 5225 [2020-10-26 23:41:55,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2020-10-26 23:41:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 4558. [2020-10-26 23:41:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4558 states. [2020-10-26 23:41:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4558 states to 4558 states and 5955 transitions. [2020-10-26 23:41:55,783 INFO L78 Accepts]: Start accepts. Automaton has 4558 states and 5955 transitions. Word has length 451 [2020-10-26 23:41:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:55,784 INFO L481 AbstractCegarLoop]: Abstraction has 4558 states and 5955 transitions. [2020-10-26 23:41:55,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 4558 states and 5955 transitions. [2020-10-26 23:41:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-10-26 23:41:55,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:55,798 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:41:55,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:41:55,798 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash -474722002, now seen corresponding path program 1 times [2020-10-26 23:41:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:55,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372603598] [2020-10-26 23:41:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:56,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:56,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:56,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:56,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:58,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:01,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:01,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 490 [2020-10-26 23:42:01,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:42:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-26 23:42:01,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:42:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:42:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 285 [2020-10-26 23:42:01,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:01,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:01,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:01,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:01,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:01,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:01,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:42:01,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:01,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:01,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:01,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:01,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:01,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:01,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:01,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:42:01,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:01,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-26 23:42:01,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:01,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:42:01,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:01,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:42:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:01,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:02,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:02,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:42:02,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:02,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-26 23:42:02,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:42:02,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:02,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:42:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:02,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:02,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:02,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:42:02,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 383 [2020-10-26 23:42:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:02,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:02,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:02,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:42:02,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:02,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 23:42:02,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:02,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-26 23:42:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:02,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 318 proven. 140 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 23:42:02,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372603598] [2020-10-26 23:42:02,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:02,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:42:02,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883908978] [2020-10-26 23:42:02,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:42:02,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:02,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:42:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:42:02,753 INFO L87 Difference]: Start difference. First operand 4558 states and 5955 transitions. Second operand 8 states. [2020-10-26 23:42:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:19,826 INFO L93 Difference]: Finished difference Result 10525 states and 14861 transitions. [2020-10-26 23:42:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:42:19,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 472 [2020-10-26 23:42:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:19,869 INFO L225 Difference]: With dead ends: 10525 [2020-10-26 23:42:19,870 INFO L226 Difference]: Without dead ends: 6586 [2020-10-26 23:42:19,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-26 23:42:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6586 states. [2020-10-26 23:42:20,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6586 to 6504. [2020-10-26 23:42:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6504 states. [2020-10-26 23:42:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6504 states to 6504 states and 8236 transitions. [2020-10-26 23:42:20,105 INFO L78 Accepts]: Start accepts. Automaton has 6504 states and 8236 transitions. Word has length 472 [2020-10-26 23:42:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:20,106 INFO L481 AbstractCegarLoop]: Abstraction has 6504 states and 8236 transitions. [2020-10-26 23:42:20,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:42:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6504 states and 8236 transitions. [2020-10-26 23:42:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-26 23:42:20,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:20,120 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:20,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:42:20,121 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash 520635866, now seen corresponding path program 1 times [2020-10-26 23:42:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:20,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220633966] [2020-10-26 23:42:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:24,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:24,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 498 [2020-10-26 23:42:24,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:42:24,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3866 [2020-10-26 23:42:24,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:42:24,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:42:24,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:24,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:24,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:24,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:24,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:24,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:24,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:42:24,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-26 23:42:24,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:42:24,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:24,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:42:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:24,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:24,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:25,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:25,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:25,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 23:42:25,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:25,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:25,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:25,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:42:25,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:25,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2020-10-26 23:42:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:25,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:25,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:25,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 163 proven. 71 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 23:42:25,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220633966] [2020-10-26 23:42:25,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:25,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:25,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831061198] [2020-10-26 23:42:25,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:25,397 INFO L87 Difference]: Start difference. First operand 6504 states and 8236 transitions. Second operand 7 states. [2020-10-26 23:42:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:36,229 INFO L93 Difference]: Finished difference Result 13726 states and 17469 transitions. [2020-10-26 23:42:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:42:36,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 482 [2020-10-26 23:42:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:36,268 INFO L225 Difference]: With dead ends: 13726 [2020-10-26 23:42:36,269 INFO L226 Difference]: Without dead ends: 7535 [2020-10-26 23:42:36,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:42:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2020-10-26 23:42:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 7470. [2020-10-26 23:42:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7470 states. [2020-10-26 23:42:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 9324 transitions. [2020-10-26 23:42:36,503 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 9324 transitions. Word has length 482 [2020-10-26 23:42:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:36,504 INFO L481 AbstractCegarLoop]: Abstraction has 7470 states and 9324 transitions. [2020-10-26 23:42:36,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:42:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 9324 transitions. [2020-10-26 23:42:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-10-26 23:42:36,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:36,520 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:42:36,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:42:36,520 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:36,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:36,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1181499166, now seen corresponding path program 1 times [2020-10-26 23:42:36,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:36,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574831620] [2020-10-26 23:42:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:37,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 510 [2020-10-26 23:42:38,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-26 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:42:38,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:38,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:38,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:38,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:38,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:42:38,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:38,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:38,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:38,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:38,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:38,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:42:38,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:38,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 23:42:38,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:38,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:42:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:38,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:42:38,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:38,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:42:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:42:38,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-26 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:42:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:42:39,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574831620] [2020-10-26 23:42:39,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:39,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:42:39,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459820546] [2020-10-26 23:42:39,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:42:39,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:42:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:42:39,214 INFO L87 Difference]: Start difference. First operand 7470 states and 9324 transitions. Second operand 8 states. [2020-10-26 23:43:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:01,442 INFO L93 Difference]: Finished difference Result 16590 states and 20976 transitions. [2020-10-26 23:43:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 23:43:01,446 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 494 [2020-10-26 23:43:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:01,474 INFO L225 Difference]: With dead ends: 16590 [2020-10-26 23:43:01,475 INFO L226 Difference]: Without dead ends: 9433 [2020-10-26 23:43:01,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:43:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2020-10-26 23:43:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 9064. [2020-10-26 23:43:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9064 states. [2020-10-26 23:43:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9064 states to 9064 states and 10646 transitions. [2020-10-26 23:43:01,714 INFO L78 Accepts]: Start accepts. Automaton has 9064 states and 10646 transitions. Word has length 494 [2020-10-26 23:43:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:01,716 INFO L481 AbstractCegarLoop]: Abstraction has 9064 states and 10646 transitions. [2020-10-26 23:43:01,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:43:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9064 states and 10646 transitions. [2020-10-26 23:43:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2020-10-26 23:43:01,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:01,731 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:43:01,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:43:01,731 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash -328872866, now seen corresponding path program 1 times [2020-10-26 23:43:01,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:01,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383189641] [2020-10-26 23:43:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:01,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:02,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:04,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:06,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:06,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 581 [2020-10-26 23:43:06,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:43:06,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 23:43:06,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:06,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:06,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 23:43:06,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:07,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:43:07,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:07,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 23:43:07,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:07,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-26 23:43:07,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:43:07,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-10-26 23:43:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:43:07,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 23:43:07,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-26 23:43:07,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 213 proven. 68 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-26 23:43:07,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383189641] [2020-10-26 23:43:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:43:07,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897334933] [2020-10-26 23:43:07,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:43:07,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:43:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:43:07,882 INFO L87 Difference]: Start difference. First operand 9064 states and 10646 transitions. Second operand 7 states. [2020-10-26 23:43:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:23,869 INFO L93 Difference]: Finished difference Result 19315 states and 23583 transitions. [2020-10-26 23:43:23,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:43:23,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 563 [2020-10-26 23:43:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:23,926 INFO L225 Difference]: With dead ends: 19315 [2020-10-26 23:43:23,926 INFO L226 Difference]: Without dead ends: 13054 [2020-10-26 23:43:23,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:43:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2020-10-26 23:43:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12675. [2020-10-26 23:43:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12675 states. [2020-10-26 23:43:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12675 states to 12675 states and 15099 transitions. [2020-10-26 23:43:24,267 INFO L78 Accepts]: Start accepts. Automaton has 12675 states and 15099 transitions. Word has length 563 [2020-10-26 23:43:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:24,268 INFO L481 AbstractCegarLoop]: Abstraction has 12675 states and 15099 transitions. [2020-10-26 23:43:24,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:43:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12675 states and 15099 transitions. [2020-10-26 23:43:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-10-26 23:43:24,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:24,282 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:43:24,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:43:24,282 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1586543674, now seen corresponding path program 1 times [2020-10-26 23:43:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:24,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875601944] [2020-10-26 23:43:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:24,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:28,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:28,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 590 [2020-10-26 23:43:28,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:43:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3872 [2020-10-26 23:43:28,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:43:28,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:28,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:28,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:28,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:28,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:43:28,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:28,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:28,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:28,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:28,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:28,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 23:43:28,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:28,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:28,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:28,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:28,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:28,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:28,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 23:43:28,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:28,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:28,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:28,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:28,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:29,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:29,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:29,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:29,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 23:43:29,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:29,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-26 23:43:29,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 23:43:29,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:29,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2020-10-26 23:43:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:29,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:29,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:43:29,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:29,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 23:43:29,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-26 23:43:29,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:29,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 231 proven. 71 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-26 23:43:29,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875601944] [2020-10-26 23:43:29,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:29,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:43:29,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861863886] [2020-10-26 23:43:29,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:43:29,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:43:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:43:29,731 INFO L87 Difference]: Start difference. First operand 12675 states and 15099 transitions. Second operand 8 states.