/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:59:10,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:59:10,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:59:10,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:59:10,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:59:10,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:59:10,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:59:10,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:59:10,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:59:10,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:59:10,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:59:10,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:59:10,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:59:10,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:59:10,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:59:10,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:59:10,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:59:10,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:59:10,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:59:10,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:59:10,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:59:10,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:59:10,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:59:10,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:59:10,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:59:10,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:59:10,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:59:10,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:59:10,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:59:10,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:59:10,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:59:10,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:59:10,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:59:10,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:59:10,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:59:10,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:59:10,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:59:10,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:59:10,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:59:10,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:59:10,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:59:10,149 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 [2020-10-28 12:59:10,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:59:10,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:59:10,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:59:10,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:59:10,193 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:59:10,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:59:10,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:59:10,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:59:10,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:59:10,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:59:10,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:59:10,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:59:10,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:59:10,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:59:10,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:59:10,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:59:10,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:59:10,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:59:10,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:59:10,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:59:10,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:59:10,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:59:10,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:59:10,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:59:10,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:59:10,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:59:10,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:59:10,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:59:10,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:59:10,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:59:10,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:59:10,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:59:10,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:59:10,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:59:10,729 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:59:10,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label02.c [2020-10-28 12:59:10,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00d035b4d/3db7358542c943ada732bba3df4acdfd/FLAG81f52b013 [2020-10-28 12:59:11,877 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:59:11,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label02.c [2020-10-28 12:59:11,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00d035b4d/3db7358542c943ada732bba3df4acdfd/FLAG81f52b013 [2020-10-28 12:59:11,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00d035b4d/3db7358542c943ada732bba3df4acdfd [2020-10-28 12:59:11,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:59:11,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:59:11,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:59:11,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:59:11,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:59:11,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:59:11" (1/1) ... [2020-10-28 12:59:11,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2351fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:11, skipping insertion in model container [2020-10-28 12:59:11,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:59:11" (1/1) ... [2020-10-28 12:59:11,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:59:12,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:59:13,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:59:13,066 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:59:13,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:59:13,375 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:59:13,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13 WrapperNode [2020-10-28 12:59:13,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:59:13,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:59:13,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:59:13,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:59:13,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... [2020-10-28 12:59:13,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:59:13,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:59:13,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:59:13,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:59:13,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:59:13,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:59:13,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:59:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:59:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:59:13,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:59:13,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:59:13,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:59:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:59:13,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:59:13,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:59:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:59:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:59:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:59:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:59:13,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:59:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:59:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:59:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:59:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:59:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:59:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:59:17,187 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:59:17,188 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:59:17,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:59:17 BoogieIcfgContainer [2020-10-28 12:59:17,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:59:17,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:59:17,194 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:59:17,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:59:17,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:59:11" (1/3) ... [2020-10-28 12:59:17,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ea312b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:59:17, skipping insertion in model container [2020-10-28 12:59:17,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:59:13" (2/3) ... [2020-10-28 12:59:17,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ea312b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:59:17, skipping insertion in model container [2020-10-28 12:59:17,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:59:17" (3/3) ... [2020-10-28 12:59:17,203 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label02.c [2020-10-28 12:59:17,216 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:59:17,222 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:59:17,237 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:59:17,269 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:59:17,269 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:59:17,269 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:59:17,269 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:59:17,270 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:59:17,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:59:17,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:59:17,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:59:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 12:59:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 12:59:17,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:59:17,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:59:17,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:59:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:59:17,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1594239113, now seen corresponding path program 1 times [2020-10-28 12:59:17,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:59:17,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316629604] [2020-10-28 12:59:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:59:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:18,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:18,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 12:59:18,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:18,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-28 12:59:18,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:18,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:18,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:59:18,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:59:18,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 12:59:18,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:59:18,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:59:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:18,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:18,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:59:18,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:18,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 12:59:18,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:18,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:59:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:59:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:59:18,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:59:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:59:18,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316629604] [2020-10-28 12:59:18,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:59:18,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:59:18,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034375191] [2020-10-28 12:59:18,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:59:18,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:59:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:59:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:59:18,425 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 12:59:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:59:24,528 INFO L93 Difference]: Finished difference Result 1245 states and 2226 transitions. [2020-10-28 12:59:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:59:24,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 12:59:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:59:24,555 INFO L225 Difference]: With dead ends: 1245 [2020-10-28 12:59:24,555 INFO L226 Difference]: Without dead ends: 725 [2020-10-28 12:59:24,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:59:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-10-28 12:59:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2020-10-28 12:59:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-28 12:59:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1130 transitions. [2020-10-28 12:59:24,687 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1130 transitions. Word has length 35 [2020-10-28 12:59:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:59:24,688 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1130 transitions. [2020-10-28 12:59:24,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:59:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1130 transitions. [2020-10-28 12:59:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 12:59:24,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:59:24,694 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:59:24,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:59:24,695 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:59:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:59:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2033415997, now seen corresponding path program 1 times [2020-10-28 12:59:24,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:59:24,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940386253] [2020-10-28 12:59:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:59:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:24,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:25,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:26,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:26,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:26,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 12:59:26,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:59:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2187 [2020-10-28 12:59:26,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:26,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:59:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:59:26,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 12:59:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 12:59:27,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:59:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:27,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:27,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:27,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:59:27,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:27,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 12:59:27,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:27,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:59:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:59:27,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:59:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:59:27,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:59:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:27,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:27,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:27,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 12:59:27,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:27,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-28 12:59:27,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:27,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:59:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:59:27,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 12:59:27,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:59:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:59:27,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940386253] [2020-10-28 12:59:27,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:59:27,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:59:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139853701] [2020-10-28 12:59:27,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:59:27,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:59:27,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:59:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:59:27,453 INFO L87 Difference]: Start difference. First operand 713 states and 1130 transitions. Second operand 7 states. [2020-10-28 12:59:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:59:35,360 INFO L93 Difference]: Finished difference Result 2110 states and 3379 transitions. [2020-10-28 12:59:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:59:35,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-28 12:59:35,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:59:35,375 INFO L225 Difference]: With dead ends: 2110 [2020-10-28 12:59:35,375 INFO L226 Difference]: Without dead ends: 1403 [2020-10-28 12:59:35,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:59:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2020-10-28 12:59:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1356. [2020-10-28 12:59:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1356 states. [2020-10-28 12:59:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1875 transitions. [2020-10-28 12:59:35,487 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1875 transitions. Word has length 107 [2020-10-28 12:59:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:59:35,487 INFO L481 AbstractCegarLoop]: Abstraction has 1356 states and 1875 transitions. [2020-10-28 12:59:35,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:59:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1875 transitions. [2020-10-28 12:59:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 12:59:35,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:59:35,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 12:59:35,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:59:35,503 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:59:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:59:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash -566489261, now seen corresponding path program 1 times [2020-10-28 12:59:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:59:35,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870519436] [2020-10-28 12:59:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:59:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:35,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:37,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:37,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 12:59:37,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:59:37,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-28 12:59:37,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:37,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:37,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:59:37,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:59:37,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 12:59:37,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:59:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:59:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:37,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:37,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:37,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:59:37,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:59:37,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:37,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:59:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:59:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:59:37,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:59:37,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:59:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:37,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:37,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 12:59:37,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:37,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-28 12:59:37,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:37,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:59:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:59:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:59:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:59:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:59:37,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870519436] [2020-10-28 12:59:37,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:59:37,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:59:37,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219060381] [2020-10-28 12:59:37,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:59:37,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:59:37,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:59:37,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:59:37,737 INFO L87 Difference]: Start difference. First operand 1356 states and 1875 transitions. Second operand 7 states. [2020-10-28 12:59:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:59:47,996 INFO L93 Difference]: Finished difference Result 3044 states and 4134 transitions. [2020-10-28 12:59:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 12:59:48,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 115 [2020-10-28 12:59:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:59:48,016 INFO L225 Difference]: With dead ends: 3044 [2020-10-28 12:59:48,016 INFO L226 Difference]: Without dead ends: 1694 [2020-10-28 12:59:48,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:59:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2020-10-28 12:59:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1669. [2020-10-28 12:59:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2020-10-28 12:59:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2198 transitions. [2020-10-28 12:59:48,098 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2198 transitions. Word has length 115 [2020-10-28 12:59:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:59:48,098 INFO L481 AbstractCegarLoop]: Abstraction has 1669 states and 2198 transitions. [2020-10-28 12:59:48,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:59:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2198 transitions. [2020-10-28 12:59:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-28 12:59:48,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:59:48,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:59:48,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:59:48,107 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:59:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:59:48,108 INFO L82 PathProgramCache]: Analyzing trace with hash 751196351, now seen corresponding path program 1 times [2020-10-28 12:59:48,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:59:48,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817343130] [2020-10-28 12:59:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:59:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:48,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:48,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:48,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:52,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:52,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-28 12:59:52,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:59:52,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4070 [2020-10-28 12:59:52,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:52,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:59:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 12:59:52,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 12:59:52,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:59:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:59:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:52,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:52,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:59:52,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:52,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 12:59:52,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:52,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:59:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:59:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:59:52,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:59:52,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:59:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:52,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:52,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 12:59:52,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:52,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 12:59:52,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:52,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:52,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:59:52,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:59:52,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 12:59:52,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 12:59:52,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-28 12:59:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:59:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:59:52,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:59:52,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 12:59:52,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:59:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-28 12:59:52,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:59:52,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:59:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:59:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:59:52,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:59:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:59:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:59:52,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817343130] [2020-10-28 12:59:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:59:52,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:59:52,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202061853] [2020-10-28 12:59:52,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:59:52,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:59:52,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:59:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:59:52,938 INFO L87 Difference]: Start difference. First operand 1669 states and 2198 transitions. Second operand 7 states. [2020-10-28 13:00:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:00:07,198 INFO L93 Difference]: Finished difference Result 4952 states and 6681 transitions. [2020-10-28 13:00:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:00:07,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 210 [2020-10-28 13:00:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:00:07,223 INFO L225 Difference]: With dead ends: 4952 [2020-10-28 13:00:07,223 INFO L226 Difference]: Without dead ends: 3278 [2020-10-28 13:00:07,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:00:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3278 states. [2020-10-28 13:00:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 3264. [2020-10-28 13:00:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3264 states. [2020-10-28 13:00:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 3881 transitions. [2020-10-28 13:00:07,347 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 3881 transitions. Word has length 210 [2020-10-28 13:00:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:00:07,347 INFO L481 AbstractCegarLoop]: Abstraction has 3264 states and 3881 transitions. [2020-10-28 13:00:07,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:00:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 3881 transitions. [2020-10-28 13:00:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-28 13:00:07,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:00:07,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:00:07,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:00:07,356 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:00:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:00:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2107186068, now seen corresponding path program 1 times [2020-10-28 13:00:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:00:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523800420] [2020-10-28 13:00:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:00:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:07,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:09,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:11,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:12,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:12,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-28 13:00:12,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:00:12,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 13:00:12,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:12,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:12,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:00:12,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-28 13:00:12,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:00:12,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:12,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:00:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:12,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:12,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:12,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:00:12,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:12,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:00:12,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:12,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:12,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:00:12,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:00:12,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:00:12,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 13:00:12,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:00:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:12,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:13,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:13,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:00:13,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:13,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-28 13:00:13,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:13,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:00:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:00:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 13:00:13,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:13,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-28 13:00:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:13,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:13,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:13,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:00:13,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:13,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 13:00:13,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:13,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:13,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:00:13,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:00:13,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:00:13,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:00:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523800420] [2020-10-28 13:00:13,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:00:13,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:00:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292726097] [2020-10-28 13:00:13,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:00:13,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:00:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:00:13,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:00:13,592 INFO L87 Difference]: Start difference. First operand 3264 states and 3881 transitions. Second operand 7 states. [2020-10-28 13:00:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:00:25,552 INFO L93 Difference]: Finished difference Result 7879 states and 9725 transitions. [2020-10-28 13:00:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:00:25,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 352 [2020-10-28 13:00:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:00:25,579 INFO L225 Difference]: With dead ends: 7879 [2020-10-28 13:00:25,579 INFO L226 Difference]: Without dead ends: 5540 [2020-10-28 13:00:25,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:00:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5540 states. [2020-10-28 13:00:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5540 to 5181. [2020-10-28 13:00:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5181 states. [2020-10-28 13:00:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5181 states to 5181 states and 6005 transitions. [2020-10-28 13:00:25,751 INFO L78 Accepts]: Start accepts. Automaton has 5181 states and 6005 transitions. Word has length 352 [2020-10-28 13:00:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:00:25,752 INFO L481 AbstractCegarLoop]: Abstraction has 5181 states and 6005 transitions. [2020-10-28 13:00:25,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:00:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5181 states and 6005 transitions. [2020-10-28 13:00:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-28 13:00:25,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:00:25,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:00:25,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:00:25,761 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:00:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:00:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1828037337, now seen corresponding path program 1 times [2020-10-28 13:00:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:00:25,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825190294] [2020-10-28 13:00:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:00:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:25,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:26,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:28,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:28,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-28 13:00:28,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:00:28,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2833 [2020-10-28 13:00:28,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:28,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:28,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:00:28,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:00:28,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-28 13:00:28,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:00:28,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:00:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:28,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:28,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:00:28,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:00:28,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:28,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:00:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:00:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:00:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:28,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:00:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:29,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:29,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:29,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:00:29,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:29,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-28 13:00:29,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:29,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:00:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:00:29,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:00:29,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:29,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:00:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:29,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:29,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:29,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 13:00:29,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:29,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-28 13:00:29,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:29,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:29,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:00:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:00:29,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:00:29,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:00:29,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825190294] [2020-10-28 13:00:29,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:00:29,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:00:29,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452862827] [2020-10-28 13:00:29,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:00:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:00:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:00:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:00:29,971 INFO L87 Difference]: Start difference. First operand 5181 states and 6005 transitions. Second operand 7 states. [2020-10-28 13:00:30,141 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 13:00:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:00:41,025 INFO L93 Difference]: Finished difference Result 12310 states and 14772 transitions. [2020-10-28 13:00:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:00:41,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 389 [2020-10-28 13:00:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:00:41,066 INFO L225 Difference]: With dead ends: 12310 [2020-10-28 13:00:41,066 INFO L226 Difference]: Without dead ends: 7442 [2020-10-28 13:00:41,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:00:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2020-10-28 13:00:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7084. [2020-10-28 13:00:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7084 states. [2020-10-28 13:00:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 8256 transitions. [2020-10-28 13:00:41,351 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 8256 transitions. Word has length 389 [2020-10-28 13:00:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:00:41,352 INFO L481 AbstractCegarLoop]: Abstraction has 7084 states and 8256 transitions. [2020-10-28 13:00:41,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:00:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 8256 transitions. [2020-10-28 13:00:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-28 13:00:41,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:00:41,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:00:41,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:00:41,362 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:00:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:00:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash -57991819, now seen corresponding path program 1 times [2020-10-28 13:00:41,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:00:41,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271529547] [2020-10-28 13:00:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:00:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:41,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:42,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:42,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 404 [2020-10-28 13:00:42,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:42,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1318 [2020-10-28 13:00:42,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:42,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:42,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 13:00:42,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-28 13:00:42,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 13:00:42,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:43,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:00:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:43,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:43,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:00:43,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:00:43,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:43,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:00:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:00:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:00:43,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:00:43,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:00:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:43,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:43,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:00:43,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:43,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 13:00:43,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:43,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:43,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:00:43,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:00:43,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-28 13:00:43,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:00:43,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:00:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:00:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:00:43,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:00:43,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:00:43,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:00:43,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-28 13:00:43,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:00:43,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:00:43,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:00:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:00:43,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:00:43,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:00:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 95 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:00:44,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271529547] [2020-10-28 13:00:44,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:00:44,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:00:44,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150710452] [2020-10-28 13:00:44,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:00:44,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:00:44,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:00:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:00:44,086 INFO L87 Difference]: Start difference. First operand 7084 states and 8256 transitions. Second operand 8 states. [2020-10-28 13:01:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:01:03,331 INFO L93 Difference]: Finished difference Result 19577 states and 23629 transitions. [2020-10-28 13:01:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:01:03,333 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 390 [2020-10-28 13:01:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:01:03,395 INFO L225 Difference]: With dead ends: 19577 [2020-10-28 13:01:03,395 INFO L226 Difference]: Without dead ends: 13393 [2020-10-28 13:01:03,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:01:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2020-10-28 13:01:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 11498. [2020-10-28 13:01:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11498 states. [2020-10-28 13:01:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11498 states to 11498 states and 14069 transitions. [2020-10-28 13:01:03,777 INFO L78 Accepts]: Start accepts. Automaton has 11498 states and 14069 transitions. Word has length 390 [2020-10-28 13:01:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:01:03,778 INFO L481 AbstractCegarLoop]: Abstraction has 11498 states and 14069 transitions. [2020-10-28 13:01:03,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:01:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11498 states and 14069 transitions. [2020-10-28 13:01:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-10-28 13:01:03,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:01:03,787 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:01:03,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:01:03,788 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:01:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:01:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2064301674, now seen corresponding path program 1 times [2020-10-28 13:01:03,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:01:03,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398672985] [2020-10-28 13:01:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:01:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:04,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:06,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:06,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 434 [2020-10-28 13:01:06,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:01:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2656 [2020-10-28 13:01:06,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:06,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:01:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:01:06,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:01:06,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:01:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:06,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:06,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:01:06,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:01:06,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:06,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:01:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:06,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:07,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:07,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:01:07,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:07,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-28 13:01:07,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:07,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:01:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:01:07,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:07,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:01:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:07,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:07,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:01:07,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:07,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 13:01:07,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:07,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:01:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:01:07,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:01:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:01:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:01:08,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398672985] [2020-10-28 13:01:08,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:01:08,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 13:01:08,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878652391] [2020-10-28 13:01:08,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:01:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:01:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:01:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:01:08,161 INFO L87 Difference]: Start difference. First operand 11498 states and 14069 transitions. Second operand 8 states. [2020-10-28 13:01:10,707 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-28 13:01:12,246 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:01:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:01:22,762 INFO L93 Difference]: Finished difference Result 24642 states and 30189 transitions. [2020-10-28 13:01:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:01:22,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 420 [2020-10-28 13:01:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:01:22,819 INFO L225 Difference]: With dead ends: 24642 [2020-10-28 13:01:22,819 INFO L226 Difference]: Without dead ends: 13457 [2020-10-28 13:01:22,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:01:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13457 states. [2020-10-28 13:01:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13457 to 13100. [2020-10-28 13:01:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13100 states. [2020-10-28 13:01:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13100 states to 13100 states and 15922 transitions. [2020-10-28 13:01:23,326 INFO L78 Accepts]: Start accepts. Automaton has 13100 states and 15922 transitions. Word has length 420 [2020-10-28 13:01:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:01:23,327 INFO L481 AbstractCegarLoop]: Abstraction has 13100 states and 15922 transitions. [2020-10-28 13:01:23,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:01:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 13100 states and 15922 transitions. [2020-10-28 13:01:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-10-28 13:01:23,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:01:23,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:01:23,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:01:23,339 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:01:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:01:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1895413090, now seen corresponding path program 1 times [2020-10-28 13:01:23,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:01:23,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456338804] [2020-10-28 13:01:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:01:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:24,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:24,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 446 [2020-10-28 13:01:24,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:24,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-28 13:01:24,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:24,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:01:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:01:24,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 13:01:24,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:24,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:01:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:24,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:24,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:24,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:01:24,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:24,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:01:24,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:24,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:01:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:01:24,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:24,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:01:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:24,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:24,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:01:24,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:24,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 13:01:24,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:24,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:01:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:24,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:01:24,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:24,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:01:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:25,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:25,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:25,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:01:25,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:25,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-28 13:01:25,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:25,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:25,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:01:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:25,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:01:25,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:01:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:01:25,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456338804] [2020-10-28 13:01:25,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:01:25,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:01:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581001995] [2020-10-28 13:01:25,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:01:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:01:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:01:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:01:25,366 INFO L87 Difference]: Start difference. First operand 13100 states and 15922 transitions. Second operand 5 states. [2020-10-28 13:01:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:01:35,697 INFO L93 Difference]: Finished difference Result 30542 states and 38173 transitions. [2020-10-28 13:01:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:01:35,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 432 [2020-10-28 13:01:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:01:35,793 INFO L225 Difference]: With dead ends: 30542 [2020-10-28 13:01:35,793 INFO L226 Difference]: Without dead ends: 17429 [2020-10-28 13:01:35,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:01:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2020-10-28 13:01:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 16500. [2020-10-28 13:01:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16500 states. [2020-10-28 13:01:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 19786 transitions. [2020-10-28 13:01:36,316 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 19786 transitions. Word has length 432 [2020-10-28 13:01:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:01:36,318 INFO L481 AbstractCegarLoop]: Abstraction has 16500 states and 19786 transitions. [2020-10-28 13:01:36,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:01:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 19786 transitions. [2020-10-28 13:01:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-28 13:01:36,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:01:36,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:01:36,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:01:36,490 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:01:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:01:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2141184250, now seen corresponding path program 1 times [2020-10-28 13:01:36,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:01:36,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136859192] [2020-10-28 13:01:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:01:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:39,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:39,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 517 [2020-10-28 13:01:39,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:01:39,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-28 13:01:39,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:39,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:01:39,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:01:39,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 13:01:39,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:39,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:01:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:39,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:39,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:39,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:01:39,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:39,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:01:39,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:39,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:01:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:39,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:01:39,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:01:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:39,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:39,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:39,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:01:39,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:39,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 13:01:39,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:39,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:01:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:01:39,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:39,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:01:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:39,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:39,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:01:39,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 13:01:39,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:39,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:01:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:01:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:01:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:40,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:40,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:01:40,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:01:40,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 13:01:40,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:40,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:01:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:01:40,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 13:01:40,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 188 proven. 28 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-28 13:01:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136859192] [2020-10-28 13:01:40,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:01:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 13:01:40,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363812556] [2020-10-28 13:01:40,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 13:01:40,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:01:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 13:01:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:01:40,535 INFO L87 Difference]: Start difference. First operand 16500 states and 19786 transitions. Second operand 6 states. [2020-10-28 13:01:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:01:52,398 INFO L93 Difference]: Finished difference Result 39413 states and 48754 transitions. [2020-10-28 13:01:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 13:01:52,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 501 [2020-10-28 13:01:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:01:52,496 INFO L225 Difference]: With dead ends: 39413 [2020-10-28 13:01:52,497 INFO L226 Difference]: Without dead ends: 25068 [2020-10-28 13:01:52,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:01:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25068 states. [2020-10-28 13:01:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25068 to 24714. [2020-10-28 13:01:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24714 states. [2020-10-28 13:01:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24714 states to 24714 states and 30195 transitions. [2020-10-28 13:01:53,105 INFO L78 Accepts]: Start accepts. Automaton has 24714 states and 30195 transitions. Word has length 501 [2020-10-28 13:01:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:01:53,107 INFO L481 AbstractCegarLoop]: Abstraction has 24714 states and 30195 transitions. [2020-10-28 13:01:53,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 13:01:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 24714 states and 30195 transitions. [2020-10-28 13:01:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2020-10-28 13:01:53,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:01:53,114 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:01:53,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:01:53,115 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:01:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:01:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1710410311, now seen corresponding path program 1 times [2020-10-28 13:01:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:01:53,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444932386] [2020-10-28 13:01:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:01:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:53,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:55,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:55,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 529 [2020-10-28 13:01:55,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 229 [2020-10-28 13:01:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:55,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:01:55,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:55,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:55,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:01:55,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:01:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:55,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:01:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:01:55,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:55,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:01:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:55,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:55,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:55,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-28 13:01:55,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:55,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:01:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:55,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:56,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:56,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:01:56,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:01:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:56,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:01:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:01:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:01:56,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:01:56,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 13:01:56,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:01:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 294 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 13:01:56,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444932386] [2020-10-28 13:01:56,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:01:56,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 13:01:56,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069179358] [2020-10-28 13:01:56,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 13:01:56,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:01:56,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 13:01:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:01:56,575 INFO L87 Difference]: Start difference. First operand 24714 states and 30195 transitions. Second operand 11 states. [2020-10-28 13:02:00,388 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-10-28 13:02:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:02:21,401 INFO L93 Difference]: Finished difference Result 62622 states and 76254 transitions. [2020-10-28 13:02:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 13:02:21,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 513 [2020-10-28 13:02:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:02:21,566 INFO L225 Difference]: With dead ends: 62622 [2020-10-28 13:02:21,566 INFO L226 Difference]: Without dead ends: 37903 [2020-10-28 13:02:21,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 13:02:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37903 states. [2020-10-28 13:02:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37903 to 32854. [2020-10-28 13:02:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32854 states. [2020-10-28 13:02:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32854 states to 32854 states and 40057 transitions. [2020-10-28 13:02:22,501 INFO L78 Accepts]: Start accepts. Automaton has 32854 states and 40057 transitions. Word has length 513 [2020-10-28 13:02:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:02:22,502 INFO L481 AbstractCegarLoop]: Abstraction has 32854 states and 40057 transitions. [2020-10-28 13:02:22,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 13:02:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32854 states and 40057 transitions. [2020-10-28 13:02:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-10-28 13:02:22,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:02:22,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:02:22,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:02:22,512 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:02:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:02:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash -691981668, now seen corresponding path program 1 times [2020-10-28 13:02:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:02:22,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428319390] [2020-10-28 13:02:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:02:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:22,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:23,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:23,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:27,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:27,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 572 [2020-10-28 13:02:27,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 289 [2020-10-28 13:02:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:27,931 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:02:27,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:02:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:27,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:27,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:27,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:02:27,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:02:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:28,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:02:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:28,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:02:28,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:02:28,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 13:02:28,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:28,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-28 13:02:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:28,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:28,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:28,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:02:28,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:28,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-28 13:02:28,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:28,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:28,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:02:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:02:28,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-28 13:02:28,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:02:29,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428319390] [2020-10-28 13:02:29,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:02:29,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:02:29,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188071140] [2020-10-28 13:02:29,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:02:29,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:02:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:02:29,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:02:29,389 INFO L87 Difference]: Start difference. First operand 32854 states and 40057 transitions. Second operand 7 states. [2020-10-28 13:02:31,746 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:02:35,004 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:02:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:02:46,718 INFO L93 Difference]: Finished difference Result 68590 states and 83700 transitions. [2020-10-28 13:02:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:02:46,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 558 [2020-10-28 13:02:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:02:46,839 INFO L225 Difference]: With dead ends: 68590 [2020-10-28 13:02:46,840 INFO L226 Difference]: Without dead ends: 38198 [2020-10-28 13:02:46,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:02:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38198 states. [2020-10-28 13:02:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38198 to 35686. [2020-10-28 13:02:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35686 states. [2020-10-28 13:02:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35686 states to 35686 states and 43438 transitions. [2020-10-28 13:02:47,679 INFO L78 Accepts]: Start accepts. Automaton has 35686 states and 43438 transitions. Word has length 558 [2020-10-28 13:02:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:02:47,680 INFO L481 AbstractCegarLoop]: Abstraction has 35686 states and 43438 transitions. [2020-10-28 13:02:47,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:02:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 35686 states and 43438 transitions. [2020-10-28 13:02:47,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2020-10-28 13:02:47,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:02:47,689 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:02:47,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:02:47,690 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:02:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:02:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -655107372, now seen corresponding path program 1 times [2020-10-28 13:02:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:02:47,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992044092] [2020-10-28 13:02:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:02:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:47,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:48,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:52,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:52,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 584 [2020-10-28 13:02:52,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:02:52,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4548 [2020-10-28 13:02:52,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:52,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:52,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:02:52,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 547 [2020-10-28 13:02:52,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 13:02:52,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:52,601 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:02:52,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:02:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:52,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:52,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:52,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:02:52,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:52,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:02:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:52,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:52,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:02:52,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:52,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 13:02:52,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:52,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:02:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:02:52,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:02:52,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:52,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:02:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:52,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:02:52,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:52,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:02:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:02:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:02:53,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:02:53,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 13:02:53,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:02:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-28 13:02:53,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:02:53,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:02:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:02:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:02:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-28 13:02:53,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:02:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 84 proven. 3 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-10-28 13:02:53,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992044092] [2020-10-28 13:02:53,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:02:53,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:02:53,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095167186] [2020-10-28 13:02:53,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:02:53,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:02:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:02:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:02:53,235 INFO L87 Difference]: Start difference. First operand 35686 states and 43438 transitions. Second operand 5 states.