/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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:16:46,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:16:46,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:16:46,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:16:46,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:16:46,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:16:46,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:16:46,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:16:46,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:16:46,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:16:46,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:16:46,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:16:46,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:16:46,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:16:46,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:16:46,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:16:46,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:16:46,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:16:46,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:16:46,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:16:46,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:16:46,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:16:46,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:16:46,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:16:46,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:16:46,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:16:46,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:16:46,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:16:46,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:16:46,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:16:46,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:16:46,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:16:46,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:16:46,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:16:46,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:16:46,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:16:46,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:16:46,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:16:46,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:16:46,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:16:46,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:16:46,283 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 18:16:46,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:16:46,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:16:46,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:16:46,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:16:46,335 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:16:46,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:16:46,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:16:46,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:16:46,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:16:46,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:16:46,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:16:46,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:16:46,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:16:46,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:16:46,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:16:46,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:16:46,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:16:46,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:16:46,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:16:46,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:16:46,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:16:46,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:16:46,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:16:46,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:16:46,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:16:46,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:16:46,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:16:46,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:16:46,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:16:46,342 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:16:46,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:16:46,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:16:46,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:16:46,780 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:16:46,781 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:16:46,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 18:16:46,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57cde9f27/185f3635c5cf4476a709b25f0b30b4ab/FLAG39eeb35af [2020-10-28 18:16:47,720 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:16:47,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 18:16:47,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57cde9f27/185f3635c5cf4476a709b25f0b30b4ab/FLAG39eeb35af [2020-10-28 18:16:47,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/57cde9f27/185f3635c5cf4476a709b25f0b30b4ab [2020-10-28 18:16:47,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:16:47,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:16:47,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:16:47,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:16:47,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:16:47,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:16:47" (1/1) ... [2020-10-28 18:16:47,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc7aac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:47, skipping insertion in model container [2020-10-28 18:16:47,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:16:47" (1/1) ... [2020-10-28 18:16:47,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:16:48,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:16:48,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:16:48,853 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:16:49,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:16:49,203 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:16:49,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49 WrapperNode [2020-10-28 18:16:49,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:16:49,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:16:49,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:16:49,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:16:49,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (1/1) ... [2020-10-28 18:16:49,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:16:49,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:16:49,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:16:49,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:16:49,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (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 18:16:49,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:16:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:16:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:16:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:16:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:16:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:16:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:16:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:16:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:16:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:16:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:16:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:16:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:16:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:16:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:16:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:16:52,396 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:16:52,396 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:16:52,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:16:52 BoogieIcfgContainer [2020-10-28 18:16:52,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:16:52,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:16:52,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:16:52,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:16:52,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:16:47" (1/3) ... [2020-10-28 18:16:52,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d01e2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:16:52, skipping insertion in model container [2020-10-28 18:16:52,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:16:49" (2/3) ... [2020-10-28 18:16:52,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d01e2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:16:52, skipping insertion in model container [2020-10-28 18:16:52,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:16:52" (3/3) ... [2020-10-28 18:16:52,408 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 18:16:52,421 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:16:52,427 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:16:52,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:16:52,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:16:52,481 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:16:52,481 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:16:52,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:16:52,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:16:52,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:16:52,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:16:52,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:16:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-10-28 18:16:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-28 18:16:52,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:52,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:52,536 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:52,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1502571194, now seen corresponding path program 1 times [2020-10-28 18:16:52,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:52,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010497271] [2020-10-28 18:16:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:53,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:55,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:56,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:56,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:56,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:58,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:58,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 18:16:58,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:16:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:16:58,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:58,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:58,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:58,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:58,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-28 18:16:58,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:16:59,997 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:00,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:00,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:00,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:00,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:00,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:00,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:17:00,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:00,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:00,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:00,292 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 18:17:00,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010497271] [2020-10-28 18:17:00,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:00,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:00,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890303428] [2020-10-28 18:17:00,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:00,320 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 5 states. [2020-10-28 18:17:08,112 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:17:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:10,141 INFO L93 Difference]: Finished difference Result 1721 states and 3067 transitions. [2020-10-28 18:17:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:17:10,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 239 [2020-10-28 18:17:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:10,194 INFO L225 Difference]: With dead ends: 1721 [2020-10-28 18:17:10,194 INFO L226 Difference]: Without dead ends: 1138 [2020-10-28 18:17:10,210 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 18:17:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2020-10-28 18:17:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1135. [2020-10-28 18:17:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1135 states. [2020-10-28 18:17:10,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1770 transitions. [2020-10-28 18:17:10,392 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1770 transitions. Word has length 239 [2020-10-28 18:17:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:10,395 INFO L481 AbstractCegarLoop]: Abstraction has 1135 states and 1770 transitions. [2020-10-28 18:17:10,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1770 transitions. [2020-10-28 18:17:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-28 18:17:10,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:10,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:10,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:17:10,413 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:10,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:10,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1070969745, now seen corresponding path program 1 times [2020-10-28 18:17:10,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:10,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701107998] [2020-10-28 18:17:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:10,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:10,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:12,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:14,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:15,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:15,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-28 18:17:15,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:17:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:17:15,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:15,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 18:17:15,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:16,863 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:16,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:16,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:16,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:16,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:16,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:17:16,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:16,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:17,045 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 18:17:17,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701107998] [2020-10-28 18:17:17,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:17,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:17,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200961131] [2020-10-28 18:17:17,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:17,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:17,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:17,064 INFO L87 Difference]: Start difference. First operand 1135 states and 1770 transitions. Second operand 5 states. [2020-10-28 18:17:23,953 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:17:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:26,020 INFO L93 Difference]: Finished difference Result 3339 states and 5207 transitions. [2020-10-28 18:17:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:26,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-10-28 18:17:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:26,041 INFO L225 Difference]: With dead ends: 3339 [2020-10-28 18:17:26,042 INFO L226 Difference]: Without dead ends: 2220 [2020-10-28 18:17:26,045 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 18:17:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2020-10-28 18:17:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2217. [2020-10-28 18:17:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2020-10-28 18:17:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3435 transitions. [2020-10-28 18:17:26,163 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3435 transitions. Word has length 241 [2020-10-28 18:17:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:26,163 INFO L481 AbstractCegarLoop]: Abstraction has 2217 states and 3435 transitions. [2020-10-28 18:17:26,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3435 transitions. [2020-10-28 18:17:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-28 18:17:26,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:26,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:26,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:17:26,171 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:26,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:26,172 INFO L82 PathProgramCache]: Analyzing trace with hash -338906047, now seen corresponding path program 1 times [2020-10-28 18:17:26,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:26,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086623137] [2020-10-28 18:17:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:26,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:31,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:31,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 18:17:31,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:17:31,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 18:17:31,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:31,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:31,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 18:17:31,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:32,636 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:32,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:32,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:32,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:32,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:17:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:32,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:32,818 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 18:17:32,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086623137] [2020-10-28 18:17:32,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:32,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402316134] [2020-10-28 18:17:32,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:32,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:32,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:32,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:32,828 INFO L87 Difference]: Start difference. First operand 2217 states and 3435 transitions. Second operand 5 states. [2020-10-28 18:17:39,383 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:17:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:41,464 INFO L93 Difference]: Finished difference Result 6438 states and 9950 transitions. [2020-10-28 18:17:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:41,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-10-28 18:17:41,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:41,490 INFO L225 Difference]: With dead ends: 6438 [2020-10-28 18:17:41,490 INFO L226 Difference]: Without dead ends: 4315 [2020-10-28 18:17:41,496 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 18:17:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2020-10-28 18:17:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4312. [2020-10-28 18:17:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4312 states. [2020-10-28 18:17:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6624 transitions. [2020-10-28 18:17:41,708 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6624 transitions. Word has length 243 [2020-10-28 18:17:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:41,710 INFO L481 AbstractCegarLoop]: Abstraction has 4312 states and 6624 transitions. [2020-10-28 18:17:41,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:41,710 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6624 transitions. [2020-10-28 18:17:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 18:17:41,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:41,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:41,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:17:41,720 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash 656386868, now seen corresponding path program 1 times [2020-10-28 18:17:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:41,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313921954] [2020-10-28 18:17:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:41,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:41,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:41,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:42,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:42,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:42,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:42,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:43,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:43,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:43,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:46,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:46,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-28 18:17:46,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:17:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 18:17:46,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:46,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 18:17:46,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:48,146 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:17:48,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:48,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:48,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:48,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:48,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:17:48,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:48,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:48,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:48,318 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 18:17:48,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313921954] [2020-10-28 18:17:48,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:48,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:48,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062540529] [2020-10-28 18:17:48,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:48,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:48,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:48,322 INFO L87 Difference]: Start difference. First operand 4312 states and 6624 transitions. Second operand 5 states. [2020-10-28 18:17:54,986 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:17:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:57,145 INFO L93 Difference]: Finished difference Result 12412 states and 18976 transitions. [2020-10-28 18:17:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:57,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 245 [2020-10-28 18:17:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:57,189 INFO L225 Difference]: With dead ends: 12412 [2020-10-28 18:17:57,189 INFO L226 Difference]: Without dead ends: 8349 [2020-10-28 18:17:57,200 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 18:17:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2020-10-28 18:17:57,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 8346. [2020-10-28 18:17:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8346 states. [2020-10-28 18:17:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8346 states to 8346 states and 12694 transitions. [2020-10-28 18:17:57,726 INFO L78 Accepts]: Start accepts. Automaton has 8346 states and 12694 transitions. Word has length 245 [2020-10-28 18:17:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:57,727 INFO L481 AbstractCegarLoop]: Abstraction has 8346 states and 12694 transitions. [2020-10-28 18:17:57,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8346 states and 12694 transitions. [2020-10-28 18:17:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-28 18:17:57,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:57,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:57,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:17:57,745 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash -794397919, now seen corresponding path program 1 times [2020-10-28 18:17:57,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:57,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819905743] [2020-10-28 18:17:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:57,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:57,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:57,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:58,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:58,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:58,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:58,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:02,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:02,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 18:18:02,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:02,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 18:18:02,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:02,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-28 18:18:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:04,336 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:04,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:04,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:04,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:18:04,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:04,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:04,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:04,510 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 18:18:04,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819905743] [2020-10-28 18:18:04,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:04,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774112453] [2020-10-28 18:18:04,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:04,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:04,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:04,514 INFO L87 Difference]: Start difference. First operand 8346 states and 12694 transitions. Second operand 5 states. [2020-10-28 18:18:12,242 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:18:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:14,787 INFO L93 Difference]: Finished difference Result 24268 states and 36780 transitions. [2020-10-28 18:18:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:14,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-10-28 18:18:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:14,854 INFO L225 Difference]: With dead ends: 24268 [2020-10-28 18:18:14,854 INFO L226 Difference]: Without dead ends: 16283 [2020-10-28 18:18:14,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2020-10-28 18:18:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 16280. [2020-10-28 18:18:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16280 states. [2020-10-28 18:18:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16280 states to 16280 states and 24560 transitions. [2020-10-28 18:18:15,943 INFO L78 Accepts]: Start accepts. Automaton has 16280 states and 24560 transitions. Word has length 247 [2020-10-28 18:18:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:15,943 INFO L481 AbstractCegarLoop]: Abstraction has 16280 states and 24560 transitions. [2020-10-28 18:18:15,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 16280 states and 24560 transitions. [2020-10-28 18:18:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-28 18:18:15,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:15,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:18:15,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:18:15,977 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash -572798596, now seen corresponding path program 1 times [2020-10-28 18:18:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768908024] [2020-10-28 18:18:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:21,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-28 18:18:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:18:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:21,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 18:18:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:22,464 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:22,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:22,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:22,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:22,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:22,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:18:22,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:22,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:22,629 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 18:18:22,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768908024] [2020-10-28 18:18:22,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:22,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:22,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536764856] [2020-10-28 18:18:22,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:22,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:22,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:22,632 INFO L87 Difference]: Start difference. First operand 16280 states and 24560 transitions. Second operand 5 states. [2020-10-28 18:18:31,175 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:18:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:34,043 INFO L93 Difference]: Finished difference Result 46274 states and 69322 transitions. [2020-10-28 18:18:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:34,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2020-10-28 18:18:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:34,115 INFO L225 Difference]: With dead ends: 46274 [2020-10-28 18:18:34,115 INFO L226 Difference]: Without dead ends: 31639 [2020-10-28 18:18:34,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31639 states. [2020-10-28 18:18:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31639 to 31636. [2020-10-28 18:18:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31636 states. [2020-10-28 18:18:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31636 states to 31636 states and 47334 transitions. [2020-10-28 18:18:36,265 INFO L78 Accepts]: Start accepts. Automaton has 31636 states and 47334 transitions. Word has length 249 [2020-10-28 18:18:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:36,265 INFO L481 AbstractCegarLoop]: Abstraction has 31636 states and 47334 transitions. [2020-10-28 18:18:36,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 31636 states and 47334 transitions. [2020-10-28 18:18:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-28 18:18:36,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:36,329 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:18:36,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:18:36,329 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1768719488, now seen corresponding path program 1 times [2020-10-28 18:18:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:36,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646964156] [2020-10-28 18:18:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:36,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:40,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:41,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:41,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-28 18:18:41,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 18:18:41,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:41,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-28 18:18:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:42,773 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:18:42,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:42,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:42,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:42,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:42,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:42,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:18:42,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:42,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:42,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:42,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:42,888 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 18:18:42,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646964156] [2020-10-28 18:18:42,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:42,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:42,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404949838] [2020-10-28 18:18:42,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:42,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:42,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:42,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:42,891 INFO L87 Difference]: Start difference. First operand 31636 states and 47334 transitions. Second operand 5 states. [2020-10-28 18:18:52,621 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:18:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:55,840 INFO L93 Difference]: Finished difference Result 91978 states and 137030 transitions. [2020-10-28 18:18:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:55,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2020-10-28 18:18:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:55,989 INFO L225 Difference]: With dead ends: 91978 [2020-10-28 18:18:55,990 INFO L226 Difference]: Without dead ends: 61903 [2020-10-28 18:18:56,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61903 states. [2020-10-28 18:19:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61903 to 61900. [2020-10-28 18:19:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61900 states. [2020-10-28 18:19:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61900 states to 61900 states and 91866 transitions. [2020-10-28 18:19:00,651 INFO L78 Accepts]: Start accepts. Automaton has 61900 states and 91866 transitions. Word has length 251 [2020-10-28 18:19:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:00,651 INFO L481 AbstractCegarLoop]: Abstraction has 61900 states and 91866 transitions. [2020-10-28 18:19:00,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 61900 states and 91866 transitions. [2020-10-28 18:19:00,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 18:19:00,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:00,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:00,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:19:00,840 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash 703120801, now seen corresponding path program 1 times [2020-10-28 18:19:00,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:00,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748650556] [2020-10-28 18:19:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:00,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:05,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:05,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-28 18:19:05,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:19:05,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 18:19:05,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:05,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:19:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-28 18:19:05,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:07,326 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:07,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:07,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:07,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:07,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:07,454 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 18:19:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748650556] [2020-10-28 18:19:07,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:07,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:07,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879064028] [2020-10-28 18:19:07,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:07,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:07,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:07,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:07,460 INFO L87 Difference]: Start difference. First operand 61900 states and 91866 transitions. Second operand 5 states. [2020-10-28 18:19:20,468 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 18:19:25,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:25,229 INFO L93 Difference]: Finished difference Result 178269 states and 263267 transitions. [2020-10-28 18:19:25,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:19:25,230 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2020-10-28 18:19:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:25,652 INFO L225 Difference]: With dead ends: 178269 [2020-10-28 18:19:25,652 INFO L226 Difference]: Without dead ends: 120826 [2020-10-28 18:19:25,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:19:25,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120826 states. [2020-10-28 18:19:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120826 to 120823. [2020-10-28 18:19:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120823 states. [2020-10-28 18:19:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120823 states to 120823 states and 177791 transitions. [2020-10-28 18:19:35,034 INFO L78 Accepts]: Start accepts. Automaton has 120823 states and 177791 transitions. Word has length 253 [2020-10-28 18:19:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:35,035 INFO L481 AbstractCegarLoop]: Abstraction has 120823 states and 177791 transitions. [2020-10-28 18:19:35,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:19:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 120823 states and 177791 transitions. [2020-10-28 18:19:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 18:19:35,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:35,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:35,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:19:35,456 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -464787576, now seen corresponding path program 1 times [2020-10-28 18:19:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:35,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526120531] [2020-10-28 18:19:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:35,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:36,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:40,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:40,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 18:19:40,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:19:40,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:19:40,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:40,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:19:40,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:19:40,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:41,847 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 18:19:41,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:41,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:41,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:41,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:19:41,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:41,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:41,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:41,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:41,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:41,963 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 18:19:41,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526120531] [2020-10-28 18:19:41,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:41,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:41,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239743726] [2020-10-28 18:19:41,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:41,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:41,966 INFO L87 Difference]: Start difference. First operand 120823 states and 177791 transitions. Second operand 5 states. [2020-10-28 18:20:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:05,662 INFO L93 Difference]: Finished difference Result 337345 states and 493975 transitions. [2020-10-28 18:20:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:20:05,663 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-10-28 18:20:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:06,264 INFO L225 Difference]: With dead ends: 337345 [2020-10-28 18:20:06,265 INFO L226 Difference]: Without dead ends: 224958 [2020-10-28 18:20:06,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:20:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224958 states. [2020-10-28 18:20:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224958 to 128925. [2020-10-28 18:20:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128925 states. [2020-10-28 18:20:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128925 states to 128925 states and 190596 transitions. [2020-10-28 18:20:18,233 INFO L78 Accepts]: Start accepts. Automaton has 128925 states and 190596 transitions. Word has length 255 [2020-10-28 18:20:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:18,233 INFO L481 AbstractCegarLoop]: Abstraction has 128925 states and 190596 transitions. [2020-10-28 18:20:18,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 128925 states and 190596 transitions. [2020-10-28 18:20:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-28 18:20:18,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:18,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:18,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:20:18,609 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash -202062207, now seen corresponding path program 1 times [2020-10-28 18:20:18,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:18,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245631890] [2020-10-28 18:20:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:18,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:19,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking...