/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/Problem13_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:37:48,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:37:48,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:37:48,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:37:48,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:37:48,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:37:48,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:37:48,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:37:48,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:37:48,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:37:48,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:37:48,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:37:48,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:37:48,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:37:48,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:37:48,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:37:48,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:37:48,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:37:48,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:37:48,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:37:48,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:37:48,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:37:48,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:37:48,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:37:48,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:37:48,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:37:48,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:37:48,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:37:48,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:37:48,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:37:48,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:37:48,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:37:48,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:37:48,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:37:48,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:37:48,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:37:48,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:37:48,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:37:48,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:37:48,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:37:48,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:37:48,232 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 12:37:48,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:37:48,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:37:48,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:37:48,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:37:48,277 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:37:48,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:37:48,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:37:48,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:37:48,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:37:48,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:37:48,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:37:48,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:37:48,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:37:48,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:37:48,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:37:48,280 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:37:48,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:37:48,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:37:48,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:37:48,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:37:48,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:37:48,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:37:48,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:37:48,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:37:48,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:37:48,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:37:48,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:37:48,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:37:48,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:37:48,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:37:48,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:37:48,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:37:48,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:37:48,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:37:48,853 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:37:48,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label35.c [2020-10-28 12:37:48,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/501e57ff5/bc1d2b728dd04df4af62c068bc9fb69e/FLAG860b3f17a [2020-10-28 12:37:50,144 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:37:50,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label35.c [2020-10-28 12:37:50,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/501e57ff5/bc1d2b728dd04df4af62c068bc9fb69e/FLAG860b3f17a [2020-10-28 12:37:50,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/501e57ff5/bc1d2b728dd04df4af62c068bc9fb69e [2020-10-28 12:37:50,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:37:50,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:37:50,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:37:50,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:37:50,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:37:50,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:37:50" (1/1) ... [2020-10-28 12:37:50,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5540fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:50, skipping insertion in model container [2020-10-28 12:37:50,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:37:50" (1/1) ... [2020-10-28 12:37:50,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:37:50,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:37:52,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:37:52,530 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:37:53,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:37:53,422 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:37:53,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53 WrapperNode [2020-10-28 12:37:53,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:37:53,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:37:53,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:37:53,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:37:53,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (1/1) ... [2020-10-28 12:37:53,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:37:53,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:37:53,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:37:53,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:37:53,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (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 12:37:54,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:37:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:37:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:37:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:37:54,053 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:37:54,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:37:54,054 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:37:54,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:37:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:37:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:37:54,054 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:37:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:37:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:37:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:37:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:37:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:37:54,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:37:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:37:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:37:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:37:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:37:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:37:54,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:37:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:37:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:38:04,075 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:38:04,078 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:38:04,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:38:04 BoogieIcfgContainer [2020-10-28 12:38:04,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:38:04,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:38:04,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:38:04,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:38:04,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:37:50" (1/3) ... [2020-10-28 12:38:04,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4185bfc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:38:04, skipping insertion in model container [2020-10-28 12:38:04,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:37:53" (2/3) ... [2020-10-28 12:38:04,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4185bfc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:38:04, skipping insertion in model container [2020-10-28 12:38:04,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:38:04" (3/3) ... [2020-10-28 12:38:04,096 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label35.c [2020-10-28 12:38:04,108 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:38:04,114 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:38:04,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:38:04,186 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:38:04,186 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:38:04,186 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:38:04,186 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:38:04,186 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:38:04,187 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:38:04,187 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:38:04,187 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:38:04,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-28 12:38:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 12:38:04,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:38:04,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:38:04,333 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:38:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:38:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash -860682086, now seen corresponding path program 1 times [2020-10-28 12:38:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:38:04,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325568219] [2020-10-28 12:38:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:38:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:04,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:05,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:05,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 12:38:05,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:05,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 511 [2020-10-28 12:38:05,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:05,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:38:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:38:05,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 12:38:05,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:38:05,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:38:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:05,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:05,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:05,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:38:05,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:05,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 12:38:05,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:05,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:38:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:05,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:38:05,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:05,329 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 12:38:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325568219] [2020-10-28 12:38:05,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:38:05,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:38:05,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179858633] [2020-10-28 12:38:05,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:38:05,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:38:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:38:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:38:05,358 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-28 12:38:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:38:23,301 INFO L93 Difference]: Finished difference Result 3248 states and 5954 transitions. [2020-10-28 12:38:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:38:23,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 12:38:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:38:23,348 INFO L225 Difference]: With dead ends: 3248 [2020-10-28 12:38:23,348 INFO L226 Difference]: Without dead ends: 2046 [2020-10-28 12:38:23,367 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 12:38:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-28 12:38:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1989. [2020-10-28 12:38:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1989 states. [2020-10-28 12:38:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 3534 transitions. [2020-10-28 12:38:23,624 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 3534 transitions. Word has length 17 [2020-10-28 12:38:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:38:23,624 INFO L481 AbstractCegarLoop]: Abstraction has 1989 states and 3534 transitions. [2020-10-28 12:38:23,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:38:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 3534 transitions. [2020-10-28 12:38:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 12:38:23,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:38:23,629 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:38:23,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:38:23,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:38:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:38:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 153564821, now seen corresponding path program 1 times [2020-10-28 12:38:23,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:38:23,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904317494] [2020-10-28 12:38:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:38:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:24,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:24,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:24,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 12:38:24,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:38:24,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-28 12:38:24,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:24,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:24,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:38:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:38:24,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 12:38:24,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 12:38:24,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:38:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:24,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:24,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:24,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:38:24,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 12:38:24,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:24,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:24,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:38:24,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:24,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:38:24,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:38:24,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:38:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:25,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:25,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 12:38:25,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:25,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-28 12:38:25,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:25,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:25,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:38:25,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:38:25,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 12:38:25,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:38:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:38:25,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904317494] [2020-10-28 12:38:25,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:38:25,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:38:25,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555418289] [2020-10-28 12:38:25,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:38:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:38:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:38:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:38:25,362 INFO L87 Difference]: Start difference. First operand 1989 states and 3534 transitions. Second operand 7 states. [2020-10-28 12:38:27,371 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:38:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:38:46,783 INFO L93 Difference]: Finished difference Result 5735 states and 10346 transitions. [2020-10-28 12:38:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:38:46,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-10-28 12:38:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:38:46,822 INFO L225 Difference]: With dead ends: 5735 [2020-10-28 12:38:46,822 INFO L226 Difference]: Without dead ends: 3752 [2020-10-28 12:38:46,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:38:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2020-10-28 12:38:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 3679. [2020-10-28 12:38:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3679 states. [2020-10-28 12:38:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 5735 transitions. [2020-10-28 12:38:46,981 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 5735 transitions. Word has length 86 [2020-10-28 12:38:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:38:46,982 INFO L481 AbstractCegarLoop]: Abstraction has 3679 states and 5735 transitions. [2020-10-28 12:38:46,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:38:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 5735 transitions. [2020-10-28 12:38:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 12:38:46,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:38:46,986 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:38:46,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:38:46,987 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:38:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:38:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1391430783, now seen corresponding path program 1 times [2020-10-28 12:38:46,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:38:46,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892690627] [2020-10-28 12:38:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:38:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:47,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:48,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:48,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 12:38:48,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:38:48,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-28 12:38:48,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:48,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:48,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:38:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:38:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:38:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:38:48,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:38:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:48,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:48,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:38:48,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:48,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 12:38:48,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:48,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:48,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:38:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:38:48,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:38:48,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:38:48,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:38:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:38:48,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:38:48,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:38:48,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:38:48,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:38:48,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-28 12:38:48,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:38:48,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:38:48,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:38:48,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:38:48,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:38:48,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:38:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:38:48,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892690627] [2020-10-28 12:38:48,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:38:48,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:38:48,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975270967] [2020-10-28 12:38:48,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:38:48,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:38:48,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:38:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:38:48,921 INFO L87 Difference]: Start difference. First operand 3679 states and 5735 transitions. Second operand 7 states. [2020-10-28 12:39:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:39:21,145 INFO L93 Difference]: Finished difference Result 11069 states and 18111 transitions. [2020-10-28 12:39:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:39:21,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-28 12:39:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:39:21,209 INFO L225 Difference]: With dead ends: 11069 [2020-10-28 12:39:21,209 INFO L226 Difference]: Without dead ends: 7396 [2020-10-28 12:39:21,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 12:39:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7396 states. [2020-10-28 12:39:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7396 to 7206. [2020-10-28 12:39:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7206 states. [2020-10-28 12:39:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 10351 transitions. [2020-10-28 12:39:21,596 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 10351 transitions. Word has length 92 [2020-10-28 12:39:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:39:21,597 INFO L481 AbstractCegarLoop]: Abstraction has 7206 states and 10351 transitions. [2020-10-28 12:39:21,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:39:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 10351 transitions. [2020-10-28 12:39:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 12:39:21,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:39:21,600 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:39:21,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:39:21,601 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:39:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:39:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1831550947, now seen corresponding path program 1 times [2020-10-28 12:39:21,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:39:21,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506860708] [2020-10-28 12:39:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:39:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:21,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:22,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:22,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 12:39:22,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:39:22,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-28 12:39:22,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:22,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:39:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:39:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:39:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:39:22,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:39:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:22,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:22,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:22,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:39:22,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:39:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 12:39:22,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:22,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:39:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:39:22,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:39:22,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:39:23,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:39:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:23,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:23,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 12:39:23,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:39:23,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-28 12:39:23,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:23,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:39:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:39:23,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 12:39:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:39:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:39:23,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506860708] [2020-10-28 12:39:23,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:39:23,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:39:23,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265412529] [2020-10-28 12:39:23,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:39:23,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:39:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:39:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:39:23,376 INFO L87 Difference]: Start difference. First operand 7206 states and 10351 transitions. Second operand 7 states. [2020-10-28 12:39:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:39:50,979 INFO L93 Difference]: Finished difference Result 15839 states and 23848 transitions. [2020-10-28 12:39:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:39:50,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-28 12:39:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:39:51,046 INFO L225 Difference]: With dead ends: 15839 [2020-10-28 12:39:51,047 INFO L226 Difference]: Without dead ends: 8639 [2020-10-28 12:39:51,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:39:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2020-10-28 12:39:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 8127. [2020-10-28 12:39:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8127 states. [2020-10-28 12:39:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 11428 transitions. [2020-10-28 12:39:51,463 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 11428 transitions. Word has length 122 [2020-10-28 12:39:51,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:39:51,466 INFO L481 AbstractCegarLoop]: Abstraction has 8127 states and 11428 transitions. [2020-10-28 12:39:51,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:39:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 11428 transitions. [2020-10-28 12:39:51,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 12:39:51,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:39:51,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:39:51,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:39:51,484 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:39:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:39:51,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1964938449, now seen corresponding path program 1 times [2020-10-28 12:39:51,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:39:51,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595977012] [2020-10-28 12:39:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:39:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:51,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:51,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:53,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1796 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:39:53,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:39:53,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:39:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:53,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:53,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:53,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:39:53,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:39:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 12:39:53,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:53,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:39:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:39:53,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:39:53,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:39:53,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:39:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:53,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:53,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:53,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 12:39:53,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:39:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-28 12:39:53,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:53,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:39:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:39:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 12:39:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:39:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:39:54,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595977012] [2020-10-28 12:39:54,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:39:54,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:39:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103870370] [2020-10-28 12:39:54,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:39:54,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:39:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:39:54,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:39:54,166 INFO L87 Difference]: Start difference. First operand 8127 states and 11428 transitions. Second operand 7 states. [2020-10-28 12:39:54,325 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 12:39:55,484 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-28 12:40:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:40:23,120 INFO L93 Difference]: Finished difference Result 15801 states and 22658 transitions. [2020-10-28 12:40:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:40:23,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 132 [2020-10-28 12:40:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:40:23,184 INFO L225 Difference]: With dead ends: 15801 [2020-10-28 12:40:23,184 INFO L226 Difference]: Without dead ends: 8483 [2020-10-28 12:40:23,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:40:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8483 states. [2020-10-28 12:40:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8483 to 8130. [2020-10-28 12:40:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8130 states. [2020-10-28 12:40:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8130 states to 8130 states and 11365 transitions. [2020-10-28 12:40:23,501 INFO L78 Accepts]: Start accepts. Automaton has 8130 states and 11365 transitions. Word has length 132 [2020-10-28 12:40:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:40:23,502 INFO L481 AbstractCegarLoop]: Abstraction has 8130 states and 11365 transitions. [2020-10-28 12:40:23,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:40:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 8130 states and 11365 transitions. [2020-10-28 12:40:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-28 12:40:23,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:40:23,507 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 12:40:23,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:40:23,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:40:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:40:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash 189894484, now seen corresponding path program 1 times [2020-10-28 12:40:23,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:40:23,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489113443] [2020-10-28 12:40:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:40:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:23,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:23,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:24,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:24,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-28 12:40:24,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:40:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-28 12:40:24,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:24,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:40:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-28 12:40:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 12:40:24,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:40:24,766 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:40:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:40:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:24,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:24,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:40:24,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:24,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:40:24,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:24,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:24,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:40:24,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:24,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:40:24,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:24,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:40:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:24,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:25,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:25,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 12:40:25,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 12:40:25,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:25,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 12:40:25,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:40:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:40:25,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489113443] [2020-10-28 12:40:25,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:40:25,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:40:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339356523] [2020-10-28 12:40:25,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:40:25,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:40:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:40:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:40:25,115 INFO L87 Difference]: Start difference. First operand 8130 states and 11365 transitions. Second operand 5 states. [2020-10-28 12:40:26,202 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:40:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:40:53,437 INFO L93 Difference]: Finished difference Result 22175 states and 32895 transitions. [2020-10-28 12:40:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:40:53,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-10-28 12:40:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:40:53,508 INFO L225 Difference]: With dead ends: 22175 [2020-10-28 12:40:53,508 INFO L226 Difference]: Without dead ends: 14854 [2020-10-28 12:40:53,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:40:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14854 states. [2020-10-28 12:40:53,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14854 to 14826. [2020-10-28 12:40:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14826 states. [2020-10-28 12:40:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14826 states to 14826 states and 20143 transitions. [2020-10-28 12:40:53,922 INFO L78 Accepts]: Start accepts. Automaton has 14826 states and 20143 transitions. Word has length 146 [2020-10-28 12:40:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:40:53,923 INFO L481 AbstractCegarLoop]: Abstraction has 14826 states and 20143 transitions. [2020-10-28 12:40:53,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:40:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 14826 states and 20143 transitions. [2020-10-28 12:40:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 12:40:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:40:53,928 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 12:40:53,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:40:53,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:40:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:40:53,930 INFO L82 PathProgramCache]: Analyzing trace with hash -379331496, now seen corresponding path program 1 times [2020-10-28 12:40:53,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:40:53,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379841892] [2020-10-28 12:40:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:40:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:54,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:54,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:55,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:55,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:55,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:55,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 12:40:55,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 12:40:55,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-10-28 12:40:55,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:55,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 230 [2020-10-28 12:40:55,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:40:55,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:56,099 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:40:56,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:40:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:56,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:56,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:40:56,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:40:56,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:56,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:40:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:40:56,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:40:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:56,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:56,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 12:40:56,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 12:40:56,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:56,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:40:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:56,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:40:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:40:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 12:40:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:56,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:56,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:56,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 12:40:56,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 12:40:56,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:56,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 12:40:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:40:56,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-28 12:40:56,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379841892] [2020-10-28 12:40:56,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:40:56,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 12:40:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023744610] [2020-10-28 12:40:56,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:40:56,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:40:56,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:40:56,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:40:56,804 INFO L87 Difference]: Start difference. First operand 14826 states and 20143 transitions. Second operand 5 states. [2020-10-28 12:40:57,942 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-28 12:41:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:41:35,070 INFO L93 Difference]: Finished difference Result 41981 states and 59321 transitions. [2020-10-28 12:41:35,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:41:35,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 237 [2020-10-28 12:41:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:41:35,173 INFO L225 Difference]: With dead ends: 41981 [2020-10-28 12:41:35,173 INFO L226 Difference]: Without dead ends: 27964 [2020-10-28 12:41:35,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:41:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27964 states. [2020-10-28 12:41:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27964 to 25529. [2020-10-28 12:41:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25529 states. [2020-10-28 12:41:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25529 states to 25529 states and 34247 transitions. [2020-10-28 12:41:35,864 INFO L78 Accepts]: Start accepts. Automaton has 25529 states and 34247 transitions. Word has length 237 [2020-10-28 12:41:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:41:35,865 INFO L481 AbstractCegarLoop]: Abstraction has 25529 states and 34247 transitions. [2020-10-28 12:41:35,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:41:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25529 states and 34247 transitions. [2020-10-28 12:41:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 12:41:35,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:35,870 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 12:41:35,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 12:41:35,871 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:35,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1400399850, now seen corresponding path program 1 times [2020-10-28 12:41:35,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:35,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798920568] [2020-10-28 12:41:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:35,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:36,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:37,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:37,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:40,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 12:41:40,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 12:41:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4583 [2020-10-28 12:41:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:40,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-28 12:41:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-28 12:41:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:40,719 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:41:40,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:40,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:40,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:40,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:40,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 12:41:40,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:40,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:41:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:40,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:41:40,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:40,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:41:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:40,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:40,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:40,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 12:41:40,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:40,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-28 12:41:40,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:40,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:40,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:40,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:40,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:41:40,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 12:41:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:41,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:41,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 12:41:41,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:41:41,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-28 12:41:41,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:41,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:41:41,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 12:41:41,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:41:41,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798920568] [2020-10-28 12:41:41,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:41:41,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:41:41,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991192878] [2020-10-28 12:41:41,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:41:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:41:41,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:41:41,656 INFO L87 Difference]: Start difference. First operand 25529 states and 34247 transitions. Second operand 7 states. [2020-10-28 12:41:41,836 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 12:41:44,814 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 69