/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:49:45,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:49:45,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:49:45,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:49:45,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:49:45,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:49:45,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:49:45,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:49:45,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:49:45,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:49:45,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:49:45,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:49:45,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:49:45,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:49:45,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:49:45,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:49:45,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:49:45,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:49:45,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:49:45,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:49:45,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:49:45,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:49:45,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:49:45,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:49:45,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:49:45,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:49:45,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:49:45,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:49:45,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:49:45,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:49:45,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:49:45,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:49:45,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:49:45,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:49:45,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:49:45,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:49:45,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:49:45,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:49:45,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:49:45,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:49:45,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:49:45,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:49:45,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:49:45,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:49:45,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:49:45,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:49:45,348 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:49:45,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:49:45,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:49:45,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:49:45,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:49:45,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:49:45,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:49:45,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:49:45,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:49:45,350 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:49:45,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:49:45,350 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:49:45,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:49:45,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:49:45,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:49:45,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:49:45,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:49:45,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:49:45,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:49:45,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:49:45,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:49:45,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:49:45,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:49:45,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:49:45,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:49:45,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:49:45,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:49:45,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:49:45,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:49:45,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:49:45,926 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:49:45,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2020-10-26 23:49:46,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b1a30eb/806d018594424c77b637833ed6187ee4/FLAGe471bc8b8 [2020-10-26 23:49:46,979 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:49:46,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label59.c [2020-10-26 23:49:47,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b1a30eb/806d018594424c77b637833ed6187ee4/FLAGe471bc8b8 [2020-10-26 23:49:47,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7b1a30eb/806d018594424c77b637833ed6187ee4 [2020-10-26 23:49:47,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:49:47,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:49:47,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:49:47,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:49:47,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:49:47,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:49:47" (1/1) ... [2020-10-26 23:49:47,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d324eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:47, skipping insertion in model container [2020-10-26 23:49:47,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:49:47" (1/1) ... [2020-10-26 23:49:47,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:49:47,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:49:48,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:49:48,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:49:48,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:49:48,449 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:49:48,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48 WrapperNode [2020-10-26 23:49:48,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:49:48,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:49:48,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:49:48,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:49:48,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... [2020-10-26 23:49:48,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:49:48,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:49:48,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:49:48,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:49:48,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:49:48,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:49:48,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:49:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:49:48,919 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:49:48,920 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:49:48,920 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:49:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:49:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:49:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:49:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:49:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:49:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:49:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:49:48,924 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:49:48,924 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:49:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:49:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:49:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:49:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:49:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:49:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:49:52,559 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:49:52,559 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:49:52,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:49:52 BoogieIcfgContainer [2020-10-26 23:49:52,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:49:52,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:49:52,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:49:52,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:49:52,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:49:47" (1/3) ... [2020-10-26 23:49:52,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e45e7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:49:52, skipping insertion in model container [2020-10-26 23:49:52,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:49:48" (2/3) ... [2020-10-26 23:49:52,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e45e7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:49:52, skipping insertion in model container [2020-10-26 23:49:52,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:49:52" (3/3) ... [2020-10-26 23:49:52,573 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label59.c [2020-10-26 23:49:52,586 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:49:52,592 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:49:52,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:49:52,641 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:49:52,641 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:49:52,641 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:49:52,641 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:49:52,641 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:49:52,642 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:49:52,642 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:49:52,642 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:49:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:49:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 23:49:52,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:49:52,689 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] [2020-10-26 23:49:52,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:49:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:49:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 733240863, now seen corresponding path program 1 times [2020-10-26 23:49:52,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:49:52,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429008575] [2020-10-26 23:49:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:49:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:53,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:53,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:53,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:49:53,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:53,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-26 23:49:53,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:49:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:49:53,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 23:49:53,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:49:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:49:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:49:53,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:49:53,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:49:53,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:49:53,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:49:53,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 23:49:53,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:49:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:49:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:49:53,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:49:53,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:49:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:49:53,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429008575] [2020-10-26 23:49:53,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:49:53,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:49:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807136910] [2020-10-26 23:49:53,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:49:53,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:49:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:49:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:49:53,932 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:50:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:03,047 INFO L93 Difference]: Finished difference Result 1250 states and 2231 transitions. [2020-10-26 23:50:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:50:03,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-26 23:50:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:03,071 INFO L225 Difference]: With dead ends: 1250 [2020-10-26 23:50:03,071 INFO L226 Difference]: Without dead ends: 730 [2020-10-26 23:50:03,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:50:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-10-26 23:50:03,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 713. [2020-10-26 23:50:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-10-26 23:50:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1207 transitions. [2020-10-26 23:50:03,225 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1207 transitions. Word has length 61 [2020-10-26 23:50:03,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:03,230 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1207 transitions. [2020-10-26 23:50:03,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:50:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1207 transitions. [2020-10-26 23:50:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-26 23:50:03,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:03,243 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:03,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:50:03,243 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1522390967, now seen corresponding path program 1 times [2020-10-26 23:50:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:03,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052282123] [2020-10-26 23:50:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:03,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:06,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:06,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 23:50:06,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:50:06,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2975 [2020-10-26 23:50:06,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:06,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:50:06,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:50:06,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:06,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:06,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:06,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:06,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:06,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:50:06,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:06,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:06,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:50:06,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:06,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:06,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 23:50:06,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:06,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-26 23:50:06,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:06,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:06,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 23:50:06,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:06,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052282123] [2020-10-26 23:50:06,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:50:06,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:50:06,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677769550] [2020-10-26 23:50:06,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:06,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:06,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:06,845 INFO L87 Difference]: Start difference. First operand 713 states and 1207 transitions. Second operand 7 states. [2020-10-26 23:50:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:16,278 INFO L93 Difference]: Finished difference Result 1776 states and 3021 transitions. [2020-10-26 23:50:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:50:16,279 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-26 23:50:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:16,289 INFO L225 Difference]: With dead ends: 1776 [2020-10-26 23:50:16,289 INFO L226 Difference]: Without dead ends: 1069 [2020-10-26 23:50:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:50:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-10-26 23:50:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1042. [2020-10-26 23:50:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-10-26 23:50:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1663 transitions. [2020-10-26 23:50:16,382 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1663 transitions. Word has length 130 [2020-10-26 23:50:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:16,383 INFO L481 AbstractCegarLoop]: Abstraction has 1042 states and 1663 transitions. [2020-10-26 23:50:16,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1663 transitions. [2020-10-26 23:50:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-26 23:50:16,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:16,387 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, 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] [2020-10-26 23:50:16,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:50:16,387 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1881862809, now seen corresponding path program 1 times [2020-10-26 23:50:16,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:16,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127390803] [2020-10-26 23:50:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:16,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:16,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:17,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:18,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:18,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 23:50:18,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:50:18,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-26 23:50:18,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:18,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:18,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:18,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:50:18,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:18,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:18,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:18,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:18,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:18,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:18,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:50:18,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:18,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:18,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:18,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:18,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:18,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:18,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 23:50:18,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:18,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 23:50:18,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:18,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 23:50:18,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:18,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127390803] [2020-10-26 23:50:18,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:50:18,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:50:18,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005461038] [2020-10-26 23:50:18,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:18,493 INFO L87 Difference]: Start difference. First operand 1042 states and 1663 transitions. Second operand 7 states. [2020-10-26 23:50:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:26,815 INFO L93 Difference]: Finished difference Result 2778 states and 4579 transitions. [2020-10-26 23:50:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:50:26,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-26 23:50:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:26,832 INFO L225 Difference]: With dead ends: 2778 [2020-10-26 23:50:26,832 INFO L226 Difference]: Without dead ends: 1742 [2020-10-26 23:50:26,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:50:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2020-10-26 23:50:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1674. [2020-10-26 23:50:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2020-10-26 23:50:26,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2330 transitions. [2020-10-26 23:50:26,933 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2330 transitions. Word has length 131 [2020-10-26 23:50:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:26,936 INFO L481 AbstractCegarLoop]: Abstraction has 1674 states and 2330 transitions. [2020-10-26 23:50:26,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2330 transitions. [2020-10-26 23:50:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-26 23:50:26,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:26,947 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:50:26,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:50:26,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1372673711, now seen corresponding path program 1 times [2020-10-26 23:50:26,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:26,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132543926] [2020-10-26 23:50:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:28,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:28,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 23:50:28,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:50:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-26 23:50:28,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:50:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:50:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:28,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:28,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:28,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:28,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:50:28,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:28,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:28,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:28,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:28,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:28,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:28,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 23:50:28,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 23:50:28,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 23:50:28,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:28,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132543926] [2020-10-26 23:50:28,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:50:28,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:50:28,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387282295] [2020-10-26 23:50:28,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:50:28,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:50:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:50:28,652 INFO L87 Difference]: Start difference. First operand 1674 states and 2330 transitions. Second operand 7 states. [2020-10-26 23:50:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:37,169 INFO L93 Difference]: Finished difference Result 4059 states and 6024 transitions. [2020-10-26 23:50:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:50:37,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-10-26 23:50:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:37,188 INFO L225 Difference]: With dead ends: 4059 [2020-10-26 23:50:37,188 INFO L226 Difference]: Without dead ends: 2698 [2020-10-26 23:50:37,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:50:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2020-10-26 23:50:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2323. [2020-10-26 23:50:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2323 states. [2020-10-26 23:50:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3106 transitions. [2020-10-26 23:50:37,300 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3106 transitions. Word has length 135 [2020-10-26 23:50:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:37,302 INFO L481 AbstractCegarLoop]: Abstraction has 2323 states and 3106 transitions. [2020-10-26 23:50:37,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:50:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3106 transitions. [2020-10-26 23:50:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-26 23:50:37,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:37,305 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, 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] [2020-10-26 23:50:37,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:50:37,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash -391837973, now seen corresponding path program 1 times [2020-10-26 23:50:37,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:37,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930925436] [2020-10-26 23:50:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:37,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:37,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:37,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:37,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 23:50:37,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:37,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-26 23:50:37,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:37,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:50:37,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:50:37,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 23:50:37,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:38,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:38,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:38,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:38,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:38,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:38,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:50:38,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:38,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:50:38,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:38,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:50:38,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:50:38,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:38,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:38,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:38,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:50:38,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:38,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 23:50:38,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:50:38,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:38,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930925436] [2020-10-26 23:50:38,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:38,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:50:38,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363423225] [2020-10-26 23:50:38,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:50:38,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:38,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:50:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:50:38,360 INFO L87 Difference]: Start difference. First operand 2323 states and 3106 transitions. Second operand 5 states. [2020-10-26 23:50:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:50:47,681 INFO L93 Difference]: Finished difference Result 5908 states and 8203 transitions. [2020-10-26 23:50:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:50:47,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-26 23:50:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:50:47,704 INFO L225 Difference]: With dead ends: 5908 [2020-10-26 23:50:47,704 INFO L226 Difference]: Without dead ends: 3591 [2020-10-26 23:50:47,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:50:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2020-10-26 23:50:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3585. [2020-10-26 23:50:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3585 states. [2020-10-26 23:50:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 4586 transitions. [2020-10-26 23:50:47,834 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 4586 transitions. Word has length 156 [2020-10-26 23:50:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:50:47,835 INFO L481 AbstractCegarLoop]: Abstraction has 3585 states and 4586 transitions. [2020-10-26 23:50:47,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:50:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 4586 transitions. [2020-10-26 23:50:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-26 23:50:47,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:50:47,843 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, 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] [2020-10-26 23:50:47,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:50:47,843 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:50:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:50:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1062871464, now seen corresponding path program 1 times [2020-10-26 23:50:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:50:47,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735644262] [2020-10-26 23:50:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:50:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:47,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:48,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:50,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:50,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-26 23:50:50,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:50:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2330 [2020-10-26 23:50:50,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 23:50:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:50:50,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-26 23:50:50,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:50,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:50:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:50,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:50,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:50:50,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:50,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:50:50,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:50,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:50:50,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:50:50,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:50:50,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:50,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:50:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:50:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:50:51,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:50:51,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-26 23:50:51,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:50:51,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 542 [2020-10-26 23:50:51,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:50:51,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:50:51,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:50:51,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-26 23:50:51,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:50:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:50:51,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735644262] [2020-10-26 23:50:51,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:50:51,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:50:51,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029288541] [2020-10-26 23:50:51,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:50:51,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:50:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:50:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:50:51,724 INFO L87 Difference]: Start difference. First operand 3585 states and 4586 transitions. Second operand 8 states. [2020-10-26 23:51:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:05,643 INFO L93 Difference]: Finished difference Result 8219 states and 10611 transitions. [2020-10-26 23:51:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:51:05,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 298 [2020-10-26 23:51:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:05,671 INFO L225 Difference]: With dead ends: 8219 [2020-10-26 23:51:05,672 INFO L226 Difference]: Without dead ends: 4603 [2020-10-26 23:51:05,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:51:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4603 states. [2020-10-26 23:51:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4603 to 4548. [2020-10-26 23:51:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4548 states. [2020-10-26 23:51:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 5717 transitions. [2020-10-26 23:51:05,857 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 5717 transitions. Word has length 298 [2020-10-26 23:51:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:05,858 INFO L481 AbstractCegarLoop]: Abstraction has 4548 states and 5717 transitions. [2020-10-26 23:51:05,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:51:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 5717 transitions. [2020-10-26 23:51:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-26 23:51:05,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:05,870 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, 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] [2020-10-26 23:51:05,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:51:05,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:05,871 INFO L82 PathProgramCache]: Analyzing trace with hash -782344045, now seen corresponding path program 1 times [2020-10-26 23:51:05,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:05,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786484965] [2020-10-26 23:51:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:06,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:06,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-26 23:51:06,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:06,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-26 23:51:06,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:06,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:06,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:51:06,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 23:51:06,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:06,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:06,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:06,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:06,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:06,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:06,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:51:06,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:06,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:06,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:06,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:07,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:07,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:51:07,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:07,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-26 23:51:07,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:07,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:07,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:07,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:51:07,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:51:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:51:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786484965] [2020-10-26 23:51:07,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:07,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:51:07,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289013255] [2020-10-26 23:51:07,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:51:07,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:51:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:51:07,862 INFO L87 Difference]: Start difference. First operand 4548 states and 5717 transitions. Second operand 5 states. [2020-10-26 23:51:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:17,449 INFO L93 Difference]: Finished difference Result 9098 states and 11535 transitions. [2020-10-26 23:51:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:51:17,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-10-26 23:51:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:17,471 INFO L225 Difference]: With dead ends: 9098 [2020-10-26 23:51:17,471 INFO L226 Difference]: Without dead ends: 4863 [2020-10-26 23:51:17,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:51:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2020-10-26 23:51:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4849. [2020-10-26 23:51:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4849 states. [2020-10-26 23:51:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 5937 transitions. [2020-10-26 23:51:17,605 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 5937 transitions. Word has length 335 [2020-10-26 23:51:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 4849 states and 5937 transitions. [2020-10-26 23:51:17,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:51:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 5937 transitions. [2020-10-26 23:51:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-26 23:51:17,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:17,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:51:17,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:51:17,616 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -482929250, now seen corresponding path program 1 times [2020-10-26 23:51:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:17,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79061123] [2020-10-26 23:51:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:17,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:17,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:18,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:19,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:22,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:22,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-26 23:51:22,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:51:22,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-26 23:51:22,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:22,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:51:22,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:51:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-26 23:51:22,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:22,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:22,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:22,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:22,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 23:51:22,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:22,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:22,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:22,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:51:22,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:22,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:23,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:23,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:23,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:51:23,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 23:51:23,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:51:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:23,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:51:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:23,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:23,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:23,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:51:23,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 23:51:23,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:23,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:51:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:23,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-10-26 23:51:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:23,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:23,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:23,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 23:51:23,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:23,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 23:51:23,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:51:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-26 23:51:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:51:23,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 164 proven. 159 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 23:51:23,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79061123] [2020-10-26 23:51:23,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:23,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:51:23,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748478701] [2020-10-26 23:51:23,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:51:23,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:51:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:51:23,915 INFO L87 Difference]: Start difference. First operand 4849 states and 5937 transitions. Second operand 7 states. [2020-10-26 23:51:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:37,169 INFO L93 Difference]: Finished difference Result 10403 states and 13138 transitions. [2020-10-26 23:51:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:51:37,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 342 [2020-10-26 23:51:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:37,197 INFO L225 Difference]: With dead ends: 10403 [2020-10-26 23:51:37,197 INFO L226 Difference]: Without dead ends: 5873 [2020-10-26 23:51:37,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:51:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2020-10-26 23:51:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5800. [2020-10-26 23:51:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5800 states. [2020-10-26 23:51:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 6931 transitions. [2020-10-26 23:51:37,374 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 6931 transitions. Word has length 342 [2020-10-26 23:51:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:37,375 INFO L481 AbstractCegarLoop]: Abstraction has 5800 states and 6931 transitions. [2020-10-26 23:51:37,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:51:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 6931 transitions. [2020-10-26 23:51:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-26 23:51:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:37,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:51:37,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:51:37,383 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1537929048, now seen corresponding path program 1 times [2020-10-26 23:51:37,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:37,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465410136] [2020-10-26 23:51:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:37,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:42,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:42,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4544 [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 338 [2020-10-26 23:51:42,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:42,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:51:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:42,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:42,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:42,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:51:42,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:42,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:51:42,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:42,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:51:42,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:51:42,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:51:42,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:42,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:51:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:42,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:42,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:51:42,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:42,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-26 23:51:42,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:51:42,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:42,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:51:42,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:42,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:51:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:42,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:43,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:51:43,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:51:43,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:51:43,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 23:51:43,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:51:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:51:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:51:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:51:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:51:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 38 proven. 71 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-26 23:51:43,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465410136] [2020-10-26 23:51:43,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:51:43,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:51:43,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070184300] [2020-10-26 23:51:43,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:51:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:51:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:51:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:51:43,700 INFO L87 Difference]: Start difference. First operand 5800 states and 6931 transitions. Second operand 8 states. [2020-10-26 23:51:46,358 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-26 23:51:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:51:58,440 INFO L93 Difference]: Finished difference Result 10792 states and 13029 transitions. [2020-10-26 23:51:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:51:58,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 352 [2020-10-26 23:51:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:51:58,471 INFO L225 Difference]: With dead ends: 10792 [2020-10-26 23:51:58,472 INFO L226 Difference]: Without dead ends: 5853 [2020-10-26 23:51:58,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:51:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2020-10-26 23:51:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5814. [2020-10-26 23:51:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5814 states. [2020-10-26 23:51:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 6897 transitions. [2020-10-26 23:51:58,612 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 6897 transitions. Word has length 352 [2020-10-26 23:51:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:51:58,613 INFO L481 AbstractCegarLoop]: Abstraction has 5814 states and 6897 transitions. [2020-10-26 23:51:58,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:51:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 6897 transitions. [2020-10-26 23:51:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-10-26 23:51:58,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:51:58,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:51:58,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:51:58,625 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:51:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:51:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash -260069699, now seen corresponding path program 1 times [2020-10-26 23:51:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:51:58,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114326648] [2020-10-26 23:51:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:51:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:51:58,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:51:59,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:02,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:03,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 422 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4566 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 394 [2020-10-26 23:52:03,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:03,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:03,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:03,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:03,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:03,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:03,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 23:52:03,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:03,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:52:03,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:03,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:03,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:03,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:52:03,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:04,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:52:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:04,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:04,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 23:52:04,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:04,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 23:52:04,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:04,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:52:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:04,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 23:52:04,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 38 proven. 211 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:52:05,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114326648] [2020-10-26 23:52:05,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:05,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:52:05,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509011372] [2020-10-26 23:52:05,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 23:52:05,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:05,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 23:52:05,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-26 23:52:05,503 INFO L87 Difference]: Start difference. First operand 5814 states and 6897 transitions. Second operand 9 states. [2020-10-26 23:52:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:20,833 INFO L93 Difference]: Finished difference Result 10780 states and 12929 transitions. [2020-10-26 23:52:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:52:20,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 408 [2020-10-26 23:52:20,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:20,852 INFO L225 Difference]: With dead ends: 10780 [2020-10-26 23:52:20,853 INFO L226 Difference]: Without dead ends: 5873 [2020-10-26 23:52:20,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-26 23:52:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2020-10-26 23:52:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5814. [2020-10-26 23:52:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5814 states. [2020-10-26 23:52:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 6895 transitions. [2020-10-26 23:52:20,988 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 6895 transitions. Word has length 408 [2020-10-26 23:52:20,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:20,989 INFO L481 AbstractCegarLoop]: Abstraction has 5814 states and 6895 transitions. [2020-10-26 23:52:20,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 23:52:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 6895 transitions. [2020-10-26 23:52:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-10-26 23:52:21,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:21,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:52:21,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:52:21,002 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1723865934, now seen corresponding path program 1 times [2020-10-26 23:52:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:21,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458375687] [2020-10-26 23:52:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:21,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:23,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:25,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:25,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 445 [2020-10-26 23:52:25,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:52:25,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4241 [2020-10-26 23:52:25,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:25,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:52:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:52:25,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:52:25,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:25,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:25,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:25,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:25,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:25,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:25,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:52:25,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:52:25,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:25,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:25,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:52:25,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:26,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-10-26 23:52:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:26,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-26 23:52:26,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:26,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 165 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:52:26,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458375687] [2020-10-26 23:52:26,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:26,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:52:26,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855118045] [2020-10-26 23:52:26,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:52:26,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:52:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:52:26,630 INFO L87 Difference]: Start difference. First operand 5814 states and 6895 transitions. Second operand 7 states. [2020-10-26 23:52:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:38,121 INFO L93 Difference]: Finished difference Result 11363 states and 13552 transitions. [2020-10-26 23:52:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:52:38,125 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 431 [2020-10-26 23:52:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:38,141 INFO L225 Difference]: With dead ends: 11363 [2020-10-26 23:52:38,141 INFO L226 Difference]: Without dead ends: 5864 [2020-10-26 23:52:38,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:52:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5864 states. [2020-10-26 23:52:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5864 to 5836. [2020-10-26 23:52:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5836 states. [2020-10-26 23:52:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 6921 transitions. [2020-10-26 23:52:38,272 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 6921 transitions. Word has length 431 [2020-10-26 23:52:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:38,273 INFO L481 AbstractCegarLoop]: Abstraction has 5836 states and 6921 transitions. [2020-10-26 23:52:38,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:52:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 6921 transitions. [2020-10-26 23:52:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-10-26 23:52:38,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:38,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:52:38,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:52:38,282 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:38,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1229789947, now seen corresponding path program 1 times [2020-10-26 23:52:38,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:38,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57320108] [2020-10-26 23:52:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:38,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:39,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:40,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 519 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1872 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-26 23:52:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:40,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:52:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:40,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:40,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:40,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:52:40,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:40,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:52:40,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:40,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:52:40,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:40,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:52:40,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:40,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:52:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:40,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:40,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:40,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:52:40,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 23:52:40,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:52:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:52:40,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:52:40,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:40,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:52:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:41,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:52:41,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-26 23:52:41,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:52:41,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 23:52:41,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:52:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:52:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:52:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-26 23:52:41,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:52:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:52:41,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57320108] [2020-10-26 23:52:41,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:52:41,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:52:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558288916] [2020-10-26 23:52:41,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:52:41,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:52:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:52:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:52:41,420 INFO L87 Difference]: Start difference. First operand 5836 states and 6921 transitions. Second operand 8 states. [2020-10-26 23:52:41,567 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-26 23:52:56,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:52:56,661 INFO L93 Difference]: Finished difference Result 16137 states and 20199 transitions. [2020-10-26 23:52:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 23:52:56,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 505 [2020-10-26 23:52:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:52:56,693 INFO L225 Difference]: With dead ends: 16137 [2020-10-26 23:52:56,693 INFO L226 Difference]: Without dead ends: 10618 [2020-10-26 23:52:56,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 23:52:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2020-10-26 23:52:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 10578. [2020-10-26 23:52:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10578 states. [2020-10-26 23:52:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10578 states to 10578 states and 12600 transitions. [2020-10-26 23:52:56,933 INFO L78 Accepts]: Start accepts. Automaton has 10578 states and 12600 transitions. Word has length 505 [2020-10-26 23:52:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:52:56,934 INFO L481 AbstractCegarLoop]: Abstraction has 10578 states and 12600 transitions. [2020-10-26 23:52:56,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:52:56,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10578 states and 12600 transitions. [2020-10-26 23:52:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2020-10-26 23:52:56,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:52:56,943 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:52:56,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:52:56,943 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:52:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:52:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2054952540, now seen corresponding path program 1 times [2020-10-26 23:52:56,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:52:56,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792126170] [2020-10-26 23:52:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:52:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:52:57,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:57,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:52:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:01,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 553 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4671 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:53:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:01,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:53:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:01,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:01,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:01,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:01,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:53:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:02,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:53:02,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:02,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:53:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:02,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:02,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:02,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:53:02,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-26 23:53:02,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:53:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:53:02,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:53:02,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:02,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 393 [2020-10-26 23:53:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:02,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:02,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-26 23:53:02,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 271 proven. 90 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-26 23:53:03,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792126170] [2020-10-26 23:53:03,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:53:03,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:53:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960948919] [2020-10-26 23:53:03,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:53:03,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:53:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:53:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:53:03,463 INFO L87 Difference]: Start difference. First operand 10578 states and 12600 transitions. Second operand 7 states. [2020-10-26 23:53:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:53:17,879 INFO L93 Difference]: Finished difference Result 22791 states and 27260 transitions. [2020-10-26 23:53:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:53:17,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 537 [2020-10-26 23:53:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:53:17,918 INFO L225 Difference]: With dead ends: 22791 [2020-10-26 23:53:17,918 INFO L226 Difference]: Without dead ends: 12837 [2020-10-26 23:53:17,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:53:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12837 states. [2020-10-26 23:53:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12837 to 12781. [2020-10-26 23:53:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12781 states. [2020-10-26 23:53:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12781 states to 12781 states and 14996 transitions. [2020-10-26 23:53:18,199 INFO L78 Accepts]: Start accepts. Automaton has 12781 states and 14996 transitions. Word has length 537 [2020-10-26 23:53:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:53:18,200 INFO L481 AbstractCegarLoop]: Abstraction has 12781 states and 14996 transitions. [2020-10-26 23:53:18,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:53:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 12781 states and 14996 transitions. [2020-10-26 23:53:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2020-10-26 23:53:18,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:53:18,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:53:18,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 23:53:18,211 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:53:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:53:18,211 INFO L82 PathProgramCache]: Analyzing trace with hash -211073636, now seen corresponding path program 1 times [2020-10-26 23:53:18,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:53:18,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792569493] [2020-10-26 23:53:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:53:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:18,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:19,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:19,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:19,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 565 [2020-10-26 23:53:19,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:53:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1593 [2020-10-26 23:53:19,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:53:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:53:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:53:19,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:53:20,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:53:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:20,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:20,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:20,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:20,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:53:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:20,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:20,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:53:20,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:20,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:53:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:20,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:20,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:20,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:53:20,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:53:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:53:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:53:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:53:20,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:53:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:53:21,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792569493] [2020-10-26 23:53:21,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:53:21,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:53:21,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119749212] [2020-10-26 23:53:21,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:53:21,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:53:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:53:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:53:21,187 INFO L87 Difference]: Start difference. First operand 12781 states and 14996 transitions. Second operand 7 states.