/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:24:40,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:24:40,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:24:40,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:24:40,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:24:40,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:24:40,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:24:40,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:24:40,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:24:40,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:24:40,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:24:40,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:24:40,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:24:40,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:24:40,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:24:40,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:24:40,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:24:40,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:24:40,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:24:40,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:24:40,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:24:40,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:24:40,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:24:40,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:24:40,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:24:40,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:24:40,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:24:40,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:24:40,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:24:40,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:24:40,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:24:40,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:24:40,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:24:40,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:24:40,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:24:40,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:24:40,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:24:40,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:24:40,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:24:40,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:24:40,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:24:40,316 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:24:40,372 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:24:40,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:24:40,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:24:40,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:24:40,378 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:24:40,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:24:40,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:24:40,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:24:40,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:24:40,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:24:40,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:24:40,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:24:40,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:24:40,381 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:24:40,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:24:40,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:24:40,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:24:40,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:24:40,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:24:40,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:24:40,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:24:40,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:24:40,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:24:40,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:24:40,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:24:40,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:24:40,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:24:40,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:24:40,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:24:40,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:24:40,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:24:40,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:24:40,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:24:40,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:24:40,880 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:24:40,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:24:40,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac91dee69/a6dbd901aef24187aed3b885e969be35/FLAG79b198786 [2020-10-28 19:24:41,788 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:24:41,792 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:24:41,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac91dee69/a6dbd901aef24187aed3b885e969be35/FLAG79b198786 [2020-10-28 19:24:41,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac91dee69/a6dbd901aef24187aed3b885e969be35 [2020-10-28 19:24:41,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:24:41,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:24:41,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:24:41,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:24:41,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:24:41,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:24:41" (1/1) ... [2020-10-28 19:24:41,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329de2bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:41, skipping insertion in model container [2020-10-28 19:24:41,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:24:41" (1/1) ... [2020-10-28 19:24:41,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:24:42,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:24:42,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:24:42,880 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:24:43,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:24:43,218 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:24:43,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43 WrapperNode [2020-10-28 19:24:43,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:24:43,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:24:43,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:24:43,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:24:43,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... [2020-10-28 19:24:43,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:24:43,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:24:43,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:24:43,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:24:43,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:24:43,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:24:43,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:24:43,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:24:43,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:24:43,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:24:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:24:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:24:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:24:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:24:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:24:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:24:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:24:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:24:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:24:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:24:43,584 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:24:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:24:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:24:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:24:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:24:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:24:43,585 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:24:43,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:24:46,384 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:24:46,384 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:24:46,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:24:46 BoogieIcfgContainer [2020-10-28 19:24:46,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:24:46,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:24:46,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:24:46,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:24:46,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:24:41" (1/3) ... [2020-10-28 19:24:46,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9d4492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:24:46, skipping insertion in model container [2020-10-28 19:24:46,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:24:43" (2/3) ... [2020-10-28 19:24:46,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9d4492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:24:46, skipping insertion in model container [2020-10-28 19:24:46,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:24:46" (3/3) ... [2020-10-28 19:24:46,396 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-28 19:24:46,409 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:24:46,414 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:24:46,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:24:46,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:24:46,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:24:46,461 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:24:46,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:24:46,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:24:46,462 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:24:46,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:24:46,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:24:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states. [2020-10-28 19:24:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-28 19:24:46,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:46,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:46,529 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 48007832, now seen corresponding path program 1 times [2020-10-28 19:24:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:46,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660023900] [2020-10-28 19:24:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:47,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:48,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:49,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:49,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:52,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:52,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-28 19:24:52,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:24:52,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:24:52,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:52,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-28 19:24:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 19:24:52,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:24:53,700 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:24:53,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:53,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:53,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:53,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:53,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:24:53,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:53,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:53,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:53,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:53,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:53,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:53,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660023900] [2020-10-28 19:24:53,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:53,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:53,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271466354] [2020-10-28 19:24:53,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:53,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:53,973 INFO L87 Difference]: Start difference. First operand 779 states. Second operand 4 states. [2020-10-28 19:24:55,450 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-28 19:25:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:01,949 INFO L93 Difference]: Finished difference Result 1215 states and 2158 transitions. [2020-10-28 19:25:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:25:01,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2020-10-28 19:25:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:01,985 INFO L225 Difference]: With dead ends: 1215 [2020-10-28 19:25:01,986 INFO L226 Difference]: Without dead ends: 980 [2020-10-28 19:25:01,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-10-28 19:25:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 977. [2020-10-28 19:25:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-28 19:25:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1695 transitions. [2020-10-28 19:25:02,160 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1695 transitions. Word has length 218 [2020-10-28 19:25:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:02,167 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 1695 transitions. [2020-10-28 19:25:02,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:25:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1695 transitions. [2020-10-28 19:25:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-28 19:25:02,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:02,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:02,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:25:02,184 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:02,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2000592653, now seen corresponding path program 1 times [2020-10-28 19:25:02,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:02,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703030454] [2020-10-28 19:25:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:02,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:03,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:04,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:05,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:06,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:07,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:07,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-28 19:25:07,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:25:07,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-28 19:25:07,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:07,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:07,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 208 [2020-10-28 19:25:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:08,998 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:25:09,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:09,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:09,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:09,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:09,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:09,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:25:09,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:09,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:25:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703030454] [2020-10-28 19:25:09,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:09,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:09,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855266239] [2020-10-28 19:25:09,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:09,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:09,261 INFO L87 Difference]: Start difference. First operand 977 states and 1695 transitions. Second operand 5 states. [2020-10-28 19:25:18,852 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:25:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:19,010 INFO L93 Difference]: Finished difference Result 2812 states and 4872 transitions. [2020-10-28 19:25:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:19,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2020-10-28 19:25:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:19,025 INFO L225 Difference]: With dead ends: 2812 [2020-10-28 19:25:19,025 INFO L226 Difference]: Without dead ends: 1920 [2020-10-28 19:25:19,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-10-28 19:25:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1917. [2020-10-28 19:25:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-28 19:25:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 3314 transitions. [2020-10-28 19:25:19,143 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 3314 transitions. Word has length 222 [2020-10-28 19:25:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:19,144 INFO L481 AbstractCegarLoop]: Abstraction has 1917 states and 3314 transitions. [2020-10-28 19:25:19,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 3314 transitions. [2020-10-28 19:25:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 19:25:19,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:19,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:19,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:25:19,152 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1873925416, now seen corresponding path program 1 times [2020-10-28 19:25:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:19,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164043798] [2020-10-28 19:25:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:19,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:19,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:20,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:20,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:21,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:22,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:22,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:24,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:24,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 19:25:24,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:25:24,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 19:25:24,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:24,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-28 19:25:24,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:25:25,777 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:25:25,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:25,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:25,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:25,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:25,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 19:25:25,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:25,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:25,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:25,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:26,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164043798] [2020-10-28 19:25:26,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:26,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:26,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997033836] [2020-10-28 19:25:26,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:26,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:26,095 INFO L87 Difference]: Start difference. First operand 1917 states and 3314 transitions. Second operand 5 states. [2020-10-28 19:25:35,468 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:25:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:35,648 INFO L93 Difference]: Finished difference Result 5568 states and 9612 transitions. [2020-10-28 19:25:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:35,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-28 19:25:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:35,671 INFO L225 Difference]: With dead ends: 5568 [2020-10-28 19:25:35,671 INFO L226 Difference]: Without dead ends: 3760 [2020-10-28 19:25:35,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2020-10-28 19:25:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3757. [2020-10-28 19:25:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3757 states. [2020-10-28 19:25:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 6472 transitions. [2020-10-28 19:25:35,913 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 6472 transitions. Word has length 223 [2020-10-28 19:25:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:35,914 INFO L481 AbstractCegarLoop]: Abstraction has 3757 states and 6472 transitions. [2020-10-28 19:25:35,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 6472 transitions. [2020-10-28 19:25:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 19:25:35,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:35,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:35,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:25:35,925 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash -927531192, now seen corresponding path program 1 times [2020-10-28 19:25:35,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:35,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60962924] [2020-10-28 19:25:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:36,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:38,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:39,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:39,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:41,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:41,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 19:25:41,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:25:41,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 19:25:41,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:41,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:41,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 19:25:41,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:42,509 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:25:42,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:42,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:42,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:42,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:42,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 19:25:42,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:42,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:42,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:42,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:42,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:42,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:25:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60962924] [2020-10-28 19:25:42,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:42,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:42,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367272114] [2020-10-28 19:25:42,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:42,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:42,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:42,786 INFO L87 Difference]: Start difference. First operand 3757 states and 6472 transitions. Second operand 5 states. [2020-10-28 19:25:52,198 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:25:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:52,408 INFO L93 Difference]: Finished difference Result 10933 states and 18804 transitions. [2020-10-28 19:25:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:52,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-28 19:25:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:52,449 INFO L225 Difference]: With dead ends: 10933 [2020-10-28 19:25:52,449 INFO L226 Difference]: Without dead ends: 7381 [2020-10-28 19:25:52,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2020-10-28 19:25:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 7378. [2020-10-28 19:25:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7378 states. [2020-10-28 19:25:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 12664 transitions. [2020-10-28 19:25:52,996 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 12664 transitions. Word has length 223 [2020-10-28 19:25:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:52,997 INFO L481 AbstractCegarLoop]: Abstraction has 7378 states and 12664 transitions. [2020-10-28 19:25:52,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 12664 transitions. [2020-10-28 19:25:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 19:25:53,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:53,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:53,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:25:53,014 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:53,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1622238405, now seen corresponding path program 1 times [2020-10-28 19:25:53,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:53,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911592967] [2020-10-28 19:25:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:53,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:53,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:54,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:55,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:56,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:57,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:58,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:58,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 19:25:58,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:25:58,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 19:25:58,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:58,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:58,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:58,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:58,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-28 19:25:58,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:59,434 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:25:59,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:59,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:59,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:59,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:59,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 19:25:59,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:59,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:59,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:59,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:59,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:59,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:59,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911592967] [2020-10-28 19:25:59,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:59,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:59,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660066688] [2020-10-28 19:25:59,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:59,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:59,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:59,670 INFO L87 Difference]: Start difference. First operand 7378 states and 12664 transitions. Second operand 5 states. [2020-10-28 19:26:08,573 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:26:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:08,861 INFO L93 Difference]: Finished difference Result 21744 states and 37286 transitions. [2020-10-28 19:26:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:08,862 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-28 19:26:08,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:08,926 INFO L225 Difference]: With dead ends: 21744 [2020-10-28 19:26:08,926 INFO L226 Difference]: Without dead ends: 14571 [2020-10-28 19:26:08,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2020-10-28 19:26:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 14568. [2020-10-28 19:26:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14568 states. [2020-10-28 19:26:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14568 states to 14568 states and 24880 transitions. [2020-10-28 19:26:10,095 INFO L78 Accepts]: Start accepts. Automaton has 14568 states and 24880 transitions. Word has length 224 [2020-10-28 19:26:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:10,095 INFO L481 AbstractCegarLoop]: Abstraction has 14568 states and 24880 transitions. [2020-10-28 19:26:10,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14568 states and 24880 transitions. [2020-10-28 19:26:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 19:26:10,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:10,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:10,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:26:10,126 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1059594319, now seen corresponding path program 1 times [2020-10-28 19:26:10,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:10,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648103497] [2020-10-28 19:26:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:10,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:10,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:10,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:12,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:13,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:15,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:15,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-28 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:15,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:15,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 19:26:15,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:16,633 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:26:16,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:16,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:16,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:16,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:16,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:26:16,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:16,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:16,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:16,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:16,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648103497] [2020-10-28 19:26:16,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:16,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:16,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018693402] [2020-10-28 19:26:16,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:16,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:16,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:16,797 INFO L87 Difference]: Start difference. First operand 14568 states and 24880 transitions. Second operand 5 states. [2020-10-28 19:26:26,483 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:26:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:27,002 INFO L93 Difference]: Finished difference Result 42182 states and 71892 transitions. [2020-10-28 19:26:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:27,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2020-10-28 19:26:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:27,080 INFO L225 Difference]: With dead ends: 42182 [2020-10-28 19:26:27,080 INFO L226 Difference]: Without dead ends: 28731 [2020-10-28 19:26:27,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28731 states. [2020-10-28 19:26:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28731 to 28728. [2020-10-28 19:26:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28728 states. [2020-10-28 19:26:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28728 states to 28728 states and 48880 transitions. [2020-10-28 19:26:29,704 INFO L78 Accepts]: Start accepts. Automaton has 28728 states and 48880 transitions. Word has length 224 [2020-10-28 19:26:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:29,704 INFO L481 AbstractCegarLoop]: Abstraction has 28728 states and 48880 transitions. [2020-10-28 19:26:29,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 28728 states and 48880 transitions. [2020-10-28 19:26:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 19:26:29,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:29,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:29,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:26:29,765 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1866560779, now seen corresponding path program 1 times [2020-10-28 19:26:29,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:29,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312535410] [2020-10-28 19:26:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:30,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:30,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:31,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:31,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:32,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:34,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 19:26:34,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:26:34,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 19:26:34,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:34,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:34,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:34,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:34,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 19:26:34,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:36,261 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:26:36,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:36,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:36,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:36,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:36,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:36,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312535410] [2020-10-28 19:26:36,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:36,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:36,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941136551] [2020-10-28 19:26:36,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:36,456 INFO L87 Difference]: Start difference. First operand 28728 states and 48880 transitions. Second operand 5 states. [2020-10-28 19:26:47,379 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:26:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:48,403 INFO L93 Difference]: Finished difference Result 82806 states and 140484 transitions. [2020-10-28 19:26:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:48,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-28 19:26:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:48,515 INFO L225 Difference]: With dead ends: 82806 [2020-10-28 19:26:48,515 INFO L226 Difference]: Without dead ends: 56075 [2020-10-28 19:26:48,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56075 states. [2020-10-28 19:26:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56075 to 56072. [2020-10-28 19:26:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56072 states. [2020-10-28 19:26:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56072 states to 56072 states and 94824 transitions. [2020-10-28 19:26:53,244 INFO L78 Accepts]: Start accepts. Automaton has 56072 states and 94824 transitions. Word has length 225 [2020-10-28 19:26:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:53,245 INFO L481 AbstractCegarLoop]: Abstraction has 56072 states and 94824 transitions. [2020-10-28 19:26:53,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 56072 states and 94824 transitions. [2020-10-28 19:26:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 19:26:53,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:53,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:53,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:26:53,326 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:53,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1172585249, now seen corresponding path program 1 times [2020-10-28 19:26:53,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:53,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884483540] [2020-10-28 19:26:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:53,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:55,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:56,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:58,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:58,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 19:26:58,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:26:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:26:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:58,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 19:26:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:59,675 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:26:59,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:59,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:59,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:59,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884483540] [2020-10-28 19:26:59,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:59,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601865221] [2020-10-28 19:26:59,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:59,855 INFO L87 Difference]: Start difference. First operand 56072 states and 94824 transitions. Second operand 5 states. [2020-10-28 19:27:13,386 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 19:27:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:15,536 INFO L93 Difference]: Finished difference Result 164102 states and 277156 transitions. [2020-10-28 19:27:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:15,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2020-10-28 19:27:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:15,824 INFO L225 Difference]: With dead ends: 164102 [2020-10-28 19:27:15,825 INFO L226 Difference]: Without dead ends: 109411 [2020-10-28 19:27:15,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109411 states. [2020-10-28 19:27:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109411 to 109408. [2020-10-28 19:27:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109408 states. [2020-10-28 19:27:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109408 states to 109408 states and 183944 transitions. [2020-10-28 19:27:24,268 INFO L78 Accepts]: Start accepts. Automaton has 109408 states and 183944 transitions. Word has length 225 [2020-10-28 19:27:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:27:24,269 INFO L481 AbstractCegarLoop]: Abstraction has 109408 states and 183944 transitions. [2020-10-28 19:27:24,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:27:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 109408 states and 183944 transitions. [2020-10-28 19:27:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-28 19:27:24,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:27:24,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:27:24,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:27:24,404 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:27:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:27:24,404 INFO L82 PathProgramCache]: Analyzing trace with hash -164605835, now seen corresponding path program 1 times [2020-10-28 19:27:24,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:27:24,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077401956] [2020-10-28 19:27:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:27:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:25,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:25,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:26,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:26,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:28,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:29,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:29,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 150 [2020-10-28 19:27:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 19:27:29,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:31,099 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:27:31,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:27:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:27:31,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:27:31,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:27:31,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:27:31,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:27:31,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:27:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:27:31,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077401956] [2020-10-28 19:27:31,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:27:31,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:27:31,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734940052] [2020-10-28 19:27:31,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:27:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:27:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:27:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:27:31,203 INFO L87 Difference]: Start difference. First operand 109408 states and 183944 transitions. Second operand 4 states. [2020-10-28 19:27:32,395 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 414 [2020-10-28 19:27:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:48,919 INFO L93 Difference]: Finished difference Result 204134 states and 342924 transitions. [2020-10-28 19:27:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:27:48,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 226 [2020-10-28 19:27:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:49,292 INFO L225 Difference]: With dead ends: 204134 [2020-10-28 19:27:49,292 INFO L226 Difference]: Without dead ends: 155299 [2020-10-28 19:27:49,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:27:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155299 states. [2020-10-28 19:28:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155299 to 155296. [2020-10-28 19:28:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155296 states. [2020-10-28 19:28:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155296 states to 155296 states and 260552 transitions. [2020-10-28 19:28:01,091 INFO L78 Accepts]: Start accepts. Automaton has 155296 states and 260552 transitions. Word has length 226 [2020-10-28 19:28:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:28:01,092 INFO L481 AbstractCegarLoop]: Abstraction has 155296 states and 260552 transitions. [2020-10-28 19:28:01,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:28:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 155296 states and 260552 transitions. [2020-10-28 19:28:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-28 19:28:01,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:28:01,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:28:01,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:28:01,517 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:28:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:28:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash -203469547, now seen corresponding path program 1 times [2020-10-28 19:28:01,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:28:01,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161531402] [2020-10-28 19:28:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:28:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:01,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:06,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-10-28 19:28:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:08,000 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 19:28:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:28:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:28:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:28:08,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:28:08,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:28:08,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:28:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:28:08,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161531402] [2020-10-28 19:28:08,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:28:08,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:28:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179184046] [2020-10-28 19:28:08,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:28:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:28:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:28:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:28:08,171 INFO L87 Difference]: Start difference. First operand 155296 states and 260552 transitions. Second operand 5 states.