/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/Problem06_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 11:01:27,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 11:01:27,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 11:01:27,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 11:01:27,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 11:01:27,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 11:01:27,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 11:01:27,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 11:01:27,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 11:01:27,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 11:01:27,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 11:01:27,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 11:01:27,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 11:01:27,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 11:01:27,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 11:01:27,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 11:01:27,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 11:01:27,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 11:01:27,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 11:01:27,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 11:01:27,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 11:01:27,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 11:01:27,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 11:01:27,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 11:01:27,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 11:01:27,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 11:01:27,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 11:01:27,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 11:01:27,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 11:01:27,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 11:01:27,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 11:01:27,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 11:01:27,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 11:01:27,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 11:01:27,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 11:01:27,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 11:01:27,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 11:01:27,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 11:01:27,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 11:01:27,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 11:01:27,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 11:01:27,297 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 11:01:27,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 11:01:27,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 11:01:27,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 11:01:27,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 11:01:27,351 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 11:01:27,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 11:01:27,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 11:01:27,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 11:01:27,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 11:01:27,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 11:01:27,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 11:01:27,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 11:01:27,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 11:01:27,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 11:01:27,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 11:01:27,354 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 11:01:27,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 11:01:27,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 11:01:27,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 11:01:27,355 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 11:01:27,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 11:01:27,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 11:01:27,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 11:01:27,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 11:01:27,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 11:01:27,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 11:01:27,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 11:01:27,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 11:01:27,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 11:01:27,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 11:01:27,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 11:01:27,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 11:01:27,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 11:01:27,823 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 11:01:27,824 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 11:01:27,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label27.c [2020-10-28 11:01:27,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92732783d/056b420c59ac431190d885e679fa8ab0/FLAG070e707e0 [2020-10-28 11:01:29,259 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 11:01:29,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label27.c [2020-10-28 11:01:29,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92732783d/056b420c59ac431190d885e679fa8ab0/FLAG070e707e0 [2020-10-28 11:01:29,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92732783d/056b420c59ac431190d885e679fa8ab0 [2020-10-28 11:01:29,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 11:01:29,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 11:01:29,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 11:01:29,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 11:01:29,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 11:01:29,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:01:29" (1/1) ... [2020-10-28 11:01:29,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf29089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:29, skipping insertion in model container [2020-10-28 11:01:29,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:01:29" (1/1) ... [2020-10-28 11:01:29,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 11:01:29,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 11:01:32,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:01:32,033 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 11:01:33,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 11:01:33,244 INFO L208 MainTranslator]: Completed translation [2020-10-28 11:01:33,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33 WrapperNode [2020-10-28 11:01:33,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 11:01:33,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 11:01:33,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 11:01:33,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 11:01:33,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (1/1) ... [2020-10-28 11:01:33,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 11:01:33,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 11:01:33,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 11:01:33,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 11:01:33,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (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 11:01:33,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 11:01:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 11:01:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 11:01:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 11:01:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 11:01:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 11:01:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 11:01:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 11:01:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 11:01:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 11:01:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 11:01:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 11:01:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 11:01:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 11:01:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 11:01:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 11:01:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 11:01:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 11:01:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 11:01:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 11:01:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 11:01:41,505 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 11:01:41,506 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 11:01:41,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:01:41 BoogieIcfgContainer [2020-10-28 11:01:41,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 11:01:41,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 11:01:41,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 11:01:41,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 11:01:41,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:01:29" (1/3) ... [2020-10-28 11:01:41,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bcb6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:01:41, skipping insertion in model container [2020-10-28 11:01:41,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:01:33" (2/3) ... [2020-10-28 11:01:41,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13bcb6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:01:41, skipping insertion in model container [2020-10-28 11:01:41,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:01:41" (3/3) ... [2020-10-28 11:01:41,524 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label27.c [2020-10-28 11:01:41,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 11:01:41,543 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 11:01:41,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 11:01:41,611 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 11:01:41,611 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 11:01:41,611 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 11:01:41,611 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 11:01:41,611 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 11:01:41,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 11:01:41,611 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 11:01:41,612 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 11:01:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-28 11:01:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2020-10-28 11:01:41,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:01:41,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:41,739 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:01:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:01:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1360671440, now seen corresponding path program 1 times [2020-10-28 11:01:41,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:01:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458733419] [2020-10-28 11:01:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:01:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:43,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:46,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:47,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:47,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 980 [2020-10-28 11:01:47,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:01:47,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-28 11:01:47,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:47,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:47,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 11:01:47,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:01:47,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 971 [2020-10-28 11:01:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 11:01:49,496 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:01:49,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:01:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:01:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:01:49,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:01:49,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:01:49,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:01:49,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 11:01:49,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:01:49,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:01:49,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:01:49,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:01:49,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:01:49,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:01:50,894 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 11:01:50,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458733419] [2020-10-28 11:01:50,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:01:50,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 11:01:50,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352403419] [2020-10-28 11:01:50,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 11:01:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:01:50,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 11:01:50,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 11:01:50,921 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 4 states. [2020-10-28 11:01:51,165 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:02:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:02:07,944 INFO L93 Difference]: Finished difference Result 3764 states and 7025 transitions. [2020-10-28 11:02:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 11:02:07,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 962 [2020-10-28 11:02:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:02:08,004 INFO L225 Difference]: With dead ends: 3764 [2020-10-28 11:02:08,004 INFO L226 Difference]: Without dead ends: 2381 [2020-10-28 11:02:08,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 11:02:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2020-10-28 11:02:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2338. [2020-10-28 11:02:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2338 states. [2020-10-28 11:02:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3805 transitions. [2020-10-28 11:02:08,226 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3805 transitions. Word has length 962 [2020-10-28 11:02:08,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:02:08,231 INFO L481 AbstractCegarLoop]: Abstraction has 2338 states and 3805 transitions. [2020-10-28 11:02:08,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 11:02:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3805 transitions. [2020-10-28 11:02:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2020-10-28 11:02:08,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:02:08,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:08,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 11:02:08,276 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:02:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:02:08,278 INFO L82 PathProgramCache]: Analyzing trace with hash 863836433, now seen corresponding path program 1 times [2020-10-28 11:02:08,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:02:08,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083665727] [2020-10-28 11:02:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:02:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:08,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:10,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:13,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:13,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 990 [2020-10-28 11:02:13,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:02:13,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5155 [2020-10-28 11:02:13,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:13,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:02:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:02:13,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 11:02:13,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:02:14,071 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:02:14,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:02:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:14,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:14,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:14,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:02:14,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:14,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 11:02:14,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:14,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:02:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:14,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:02:14,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:02:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:14,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:14,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 11:02:14,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:14,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 11:02:14,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:14,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:02:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:02:14,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 11:02:14,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:02:14,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083665727] [2020-10-28 11:02:14,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:02:14,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:02:14,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393136605] [2020-10-28 11:02:14,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:02:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:02:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:02:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:02:14,879 INFO L87 Difference]: Start difference. First operand 2338 states and 3805 transitions. Second operand 7 states. [2020-10-28 11:02:15,187 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:02:16,450 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:02:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:02:35,532 INFO L93 Difference]: Finished difference Result 6947 states and 11384 transitions. [2020-10-28 11:02:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:02:35,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 970 [2020-10-28 11:02:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:02:35,569 INFO L225 Difference]: With dead ends: 6947 [2020-10-28 11:02:35,569 INFO L226 Difference]: Without dead ends: 4615 [2020-10-28 11:02:35,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:02:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2020-10-28 11:02:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 4507. [2020-10-28 11:02:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4507 states. [2020-10-28 11:02:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 6766 transitions. [2020-10-28 11:02:35,740 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 6766 transitions. Word has length 970 [2020-10-28 11:02:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:02:35,740 INFO L481 AbstractCegarLoop]: Abstraction has 4507 states and 6766 transitions. [2020-10-28 11:02:35,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:02:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 6766 transitions. [2020-10-28 11:02:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2020-10-28 11:02:35,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:02:35,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:02:35,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 11:02:35,765 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:02:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:02:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1664575610, now seen corresponding path program 1 times [2020-10-28 11:02:35,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:02:35,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130394213] [2020-10-28 11:02:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:02:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:35,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:40,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1009 [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:02:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:02:40,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 11:02:40,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:41,741 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:02:41,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:02:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:41,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:41,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:02:41,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:41,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 11:02:41,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:41,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:02:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:02:41,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:02:41,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:02:41,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:02:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:02:41,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:02:42,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:02:42,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 11:02:42,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:02:42,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 11:02:42,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:02:42,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:02:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:02:42,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:02:42,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 11:02:42,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:02:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:02:42,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130394213] [2020-10-28 11:02:42,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:02:42,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:02:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551227025] [2020-10-28 11:02:42,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:02:42,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:02:42,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:02:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:02:42,757 INFO L87 Difference]: Start difference. First operand 4507 states and 6766 transitions. Second operand 7 states. [2020-10-28 11:02:43,045 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:02:44,381 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:03:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:03:05,454 INFO L93 Difference]: Finished difference Result 13516 states and 20696 transitions. [2020-10-28 11:03:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 11:03:05,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 989 [2020-10-28 11:03:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:03:05,507 INFO L225 Difference]: With dead ends: 13516 [2020-10-28 11:03:05,507 INFO L226 Difference]: Without dead ends: 9015 [2020-10-28 11:03:05,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 11:03:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9015 states. [2020-10-28 11:03:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9015 to 8933. [2020-10-28 11:03:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8933 states. [2020-10-28 11:03:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 12868 transitions. [2020-10-28 11:03:05,817 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 12868 transitions. Word has length 989 [2020-10-28 11:03:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:03:05,820 INFO L481 AbstractCegarLoop]: Abstraction has 8933 states and 12868 transitions. [2020-10-28 11:03:05,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:03:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 12868 transitions. [2020-10-28 11:03:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2020-10-28 11:03:05,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:03:05,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:05,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 11:03:05,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:03:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:03:05,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1771051267, now seen corresponding path program 1 times [2020-10-28 11:03:05,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:03:05,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657296181] [2020-10-28 11:03:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:03:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:06,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:06,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:11,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:11,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1021 [2020-10-28 11:03:11,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:03:11,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5161 [2020-10-28 11:03:11,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:11,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:11,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:03:11,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:03:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 11:03:11,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:11,835 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:03:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:03:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:11,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:11,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:11,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:03:11,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:11,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 11:03:11,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:11,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:03:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:11,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:03:11,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:11,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:03:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:12,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:12,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:12,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:03:12,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:12,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 11:03:12,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:12,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:03:12,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:03:12,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:12,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 11:03:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:12,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:12,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:03:12,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:12,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 11:03:12,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:12,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:03:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 11:03:12,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:03:12,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 11:03:12,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657296181] [2020-10-28 11:03:12,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:03:12,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:03:12,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38902554] [2020-10-28 11:03:12,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:03:12,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:03:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:03:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:03:12,984 INFO L87 Difference]: Start difference. First operand 8933 states and 12868 transitions. Second operand 7 states. [2020-10-28 11:03:13,295 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 11:03:14,960 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 11:03:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:03:38,869 INFO L93 Difference]: Finished difference Result 27376 states and 41338 transitions. [2020-10-28 11:03:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 11:03:38,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 999 [2020-10-28 11:03:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:03:38,975 INFO L225 Difference]: With dead ends: 27376 [2020-10-28 11:03:38,976 INFO L226 Difference]: Without dead ends: 18449 [2020-10-28 11:03:39,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:03:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18449 states. [2020-10-28 11:03:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18449 to 17974. [2020-10-28 11:03:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17974 states. [2020-10-28 11:03:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17974 states to 17974 states and 24988 transitions. [2020-10-28 11:03:39,615 INFO L78 Accepts]: Start accepts. Automaton has 17974 states and 24988 transitions. Word has length 999 [2020-10-28 11:03:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:03:39,616 INFO L481 AbstractCegarLoop]: Abstraction has 17974 states and 24988 transitions. [2020-10-28 11:03:39,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:03:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17974 states and 24988 transitions. [2020-10-28 11:03:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2020-10-28 11:03:39,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:03:39,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:03:39,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 11:03:39,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:03:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:03:39,689 INFO L82 PathProgramCache]: Analyzing trace with hash -44123023, now seen corresponding path program 1 times [2020-10-28 11:03:39,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:03:39,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876922610] [2020-10-28 11:03:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:03:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:39,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:40,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:44,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1036 [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:03:44,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 11:03:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 11:03:44,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:45,348 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:03:45,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:03:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:45,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:45,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:45,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:03:45,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:03:45,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:45,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:03:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:45,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:45,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:45,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:03:45,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 11:03:45,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:45,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:03:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:45,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:45,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:03:45,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:45,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-28 11:03:45,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:45,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:03:45,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 11:03:45,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 11:03:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:03:45,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:03:45,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:03:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 11:03:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:03:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 60 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 11:03:46,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876922610] [2020-10-28 11:03:46,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:03:46,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 11:03:46,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104537426] [2020-10-28 11:03:46,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 11:03:46,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:03:46,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 11:03:46,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 11:03:46,367 INFO L87 Difference]: Start difference. First operand 17974 states and 24988 transitions. Second operand 8 states. [2020-10-28 11:03:46,732 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 11:03:47,435 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 11:04:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:04:19,918 INFO L93 Difference]: Finished difference Result 59572 states and 93110 transitions. [2020-10-28 11:04:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 11:04:19,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1012 [2020-10-28 11:04:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:04:20,150 INFO L225 Difference]: With dead ends: 59572 [2020-10-28 11:04:20,151 INFO L226 Difference]: Without dead ends: 41604 [2020-10-28 11:04:20,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-28 11:04:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41604 states. [2020-10-28 11:04:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41604 to 41381. [2020-10-28 11:04:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41381 states. [2020-10-28 11:04:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41381 states to 41381 states and 62154 transitions. [2020-10-28 11:04:21,877 INFO L78 Accepts]: Start accepts. Automaton has 41381 states and 62154 transitions. Word has length 1012 [2020-10-28 11:04:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:04:21,877 INFO L481 AbstractCegarLoop]: Abstraction has 41381 states and 62154 transitions. [2020-10-28 11:04:21,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 11:04:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 41381 states and 62154 transitions. [2020-10-28 11:04:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1017 [2020-10-28 11:04:22,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:22,066 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:04:22,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 11:04:22,067 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1800255945, now seen corresponding path program 1 times [2020-10-28 11:04:22,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:22,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885404869] [2020-10-28 11:04:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:25,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:27,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:27,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1036 [2020-10-28 11:04:27,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 11:04:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5322 [2020-10-28 11:04:27,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:27,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:27,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:04:27,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:04:27,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 11:04:27,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 11:04:28,025 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:04:28,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:04:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:28,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:28,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:04:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:04:28,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:28,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:04:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:28,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:04:28,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 11:04:28,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:04:28,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 11:04:28,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:04:28,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:04:28,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:04:28,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:04:28,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 11:04:28,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:04:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 11:04:28,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885404869] [2020-10-28 11:04:28,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 11:04:28,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 11:04:28,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349364931] [2020-10-28 11:04:28,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:04:28,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:04:28,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:04:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:04:28,845 INFO L87 Difference]: Start difference. First operand 41381 states and 62154 transitions. Second operand 7 states. [2020-10-28 11:04:29,122 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 11:04:30,640 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 11:04:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 11:04:51,422 INFO L93 Difference]: Finished difference Result 118689 states and 201509 transitions. [2020-10-28 11:04:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 11:04:51,423 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1016 [2020-10-28 11:04:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 11:04:51,906 INFO L225 Difference]: With dead ends: 118689 [2020-10-28 11:04:51,906 INFO L226 Difference]: Without dead ends: 77314 [2020-10-28 11:04:52,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 11:04:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77314 states. [2020-10-28 11:04:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77314 to 76760. [2020-10-28 11:04:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76760 states. [2020-10-28 11:04:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76760 states to 76760 states and 118382 transitions. [2020-10-28 11:04:56,072 INFO L78 Accepts]: Start accepts. Automaton has 76760 states and 118382 transitions. Word has length 1016 [2020-10-28 11:04:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 11:04:56,073 INFO L481 AbstractCegarLoop]: Abstraction has 76760 states and 118382 transitions. [2020-10-28 11:04:56,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 11:04:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 76760 states and 118382 transitions. [2020-10-28 11:04:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1021 [2020-10-28 11:04:56,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 11:04:56,523 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:04:56,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 11:04:56,524 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 11:04:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 11:04:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1165265766, now seen corresponding path program 1 times [2020-10-28 11:04:56,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 11:04:56,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788444078] [2020-10-28 11:04:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 11:04:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:04:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:04:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:01,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:01,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1044 [2020-10-28 11:05:01,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 11:05:01,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 11:05:01,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:01,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 11:05:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 11:05:01,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 11:05:01,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:02,236 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 11:05:02,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 11:05:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:02,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 11:05:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:02,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 11:05:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:02,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:02,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 11:05:02,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:02,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 11:05:02,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:02,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 11:05:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 11:05:02,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 11:05:02,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:02,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 11:05:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:02,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:02,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 11:05:02,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:02,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 11:05:02,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:02,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:02,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:05:02,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 11:05:02,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:05:02,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:02,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 11:05:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 11:05:02,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 11:05:02,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 11:05:02,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 11:05:02,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 11:05:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 49 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 11:05:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788444078] [2020-10-28 11:05:03,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 11:05:03,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 11:05:03,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932281982] [2020-10-28 11:05:03,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 11:05:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 11:05:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 11:05:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 11:05:03,199 INFO L87 Difference]: Start difference. First operand 76760 states and 118382 transitions. Second operand 7 states. [2020-10-28 11:05:03,477 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 161