/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:14:31,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:14:31,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:14:31,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:14:31,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:14:31,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:14:31,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:14:31,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:14:31,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:14:31,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:14:31,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:14:31,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:14:31,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:14:31,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:14:31,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:14:31,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:14:31,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:14:31,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:14:31,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:14:31,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:14:31,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:14:31,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:14:31,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:14:31,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:14:31,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:14:31,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:14:31,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:14:31,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:14:31,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:14:31,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:14:31,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:14:31,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:14:31,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:14:31,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:14:31,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:14:31,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:14:31,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:14:31,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:14:31,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:14:31,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:14:31,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:14:31,901 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 [2020-10-29 13:14:31,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:14:31,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:14:31,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:14:31,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:14:31,963 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:14:31,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:14:31,964 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:14:31,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:14:31,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:14:31,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:14:31,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:14:31,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:14:31,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:14:31,966 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:14:31,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:14:31,967 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:14:31,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:14:31,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:14:31,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:14:31,968 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:14:31,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:14:31,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:14:31,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:14:31,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:14:31,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:14:31,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:14:31,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:14:31,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:14:31,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:14:31,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:14:32,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:14:32,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:14:32,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:14:32,397 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:14:32,397 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:14:32,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:14:32,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5efffe3b/a59b3accfbac4e4d90e2c784f2ee05e4/FLAGa19f9a2d5 [2020-10-29 13:14:33,201 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:14:33,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:14:33,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5efffe3b/a59b3accfbac4e4d90e2c784f2ee05e4/FLAGa19f9a2d5 [2020-10-29 13:14:33,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b5efffe3b/a59b3accfbac4e4d90e2c784f2ee05e4 [2020-10-29 13:14:33,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:14:33,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:14:33,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:14:33,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:14:33,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:14:33,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:14:33" (1/1) ... [2020-10-29 13:14:33,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6bd891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:33, skipping insertion in model container [2020-10-29 13:14:33,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:14:33" (1/1) ... [2020-10-29 13:14:33,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:14:33,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:14:33,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:14:33,972 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:14:34,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:14:34,227 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:14:34,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34 WrapperNode [2020-10-29 13:14:34,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:14:34,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:14:34,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:14:34,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:14:34,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (1/1) ... [2020-10-29 13:14:34,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:14:34,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:14:34,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:14:34,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:14:34,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (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 [2020-10-29 13:14:34,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:14:34,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:14:34,492 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:14:34,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:14:34,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:14:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:14:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:14:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:14:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:14:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:14:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:14:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:14:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:14:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:14:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:14:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:14:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:14:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:14:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:14:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:14:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:14:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:14:36,195 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:14:36,196 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:14:36,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:14:36 BoogieIcfgContainer [2020-10-29 13:14:36,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:14:36,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:14:36,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:14:36,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:14:36,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:14:33" (1/3) ... [2020-10-29 13:14:36,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659e66a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:14:36, skipping insertion in model container [2020-10-29 13:14:36,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:14:34" (2/3) ... [2020-10-29 13:14:36,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659e66a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:14:36, skipping insertion in model container [2020-10-29 13:14:36,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:14:36" (3/3) ... [2020-10-29 13:14:36,209 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-29 13:14:36,222 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:14:36,228 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:14:36,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:14:36,273 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:14:36,273 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:14:36,274 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:14:36,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:14:36,274 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:14:36,274 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:14:36,274 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:14:36,274 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:14:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-29 13:14:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 13:14:36,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:36,315 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] [2020-10-29 13:14:36,315 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:36,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-29 13:14:36,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:36,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056771649] [2020-10-29 13:14:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:36,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:37,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:38,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:40,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:41,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:41,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 13:14:41,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:14:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:14:41,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:41,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:14:41,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 13:14:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:14:42,306 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:42,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:42,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:42,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:42,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:42,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:42,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:14:42,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:42,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:42,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:14:42,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:42,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:14:42,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:42,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056771649] [2020-10-29 13:14:42,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:42,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:14:42,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983633095] [2020-10-29 13:14:42,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:42,400 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 6 states. [2020-10-29 13:14:42,851 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:45,211 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:14:45,890 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:14:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:47,233 INFO L93 Difference]: Finished difference Result 803 states and 1345 transitions. [2020-10-29 13:14:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:14:47,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-29 13:14:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:47,261 INFO L225 Difference]: With dead ends: 803 [2020-10-29 13:14:47,262 INFO L226 Difference]: Without dead ends: 694 [2020-10-29 13:14:47,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:14:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-10-29 13:14:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 387. [2020-10-29 13:14:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-29 13:14:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 533 transitions. [2020-10-29 13:14:47,383 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 533 transitions. Word has length 51 [2020-10-29 13:14:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:47,384 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 533 transitions. [2020-10-29 13:14:47,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:47,384 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 533 transitions. [2020-10-29 13:14:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 13:14:47,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:47,389 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] [2020-10-29 13:14:47,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:14:47,389 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 984145560, now seen corresponding path program 1 times [2020-10-29 13:14:47,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:47,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921773899] [2020-10-29 13:14:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:48,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:50,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:51,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:52,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:52,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-29 13:14:52,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:14:52,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:14:52,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:52,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:14:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:14:52,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:14:52,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:52,921 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:14:52,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:14:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:52,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:52,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:14:52,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:14:52,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:14:52,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:14:52,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:14:52,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:14:52,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:14:52,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:14:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:14:52,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:14:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:14:52,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921773899] [2020-10-29 13:14:52,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:14:52,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:14:52,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621722450] [2020-10-29 13:14:52,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:14:52,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:14:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:14:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:14:52,993 INFO L87 Difference]: Start difference. First operand 387 states and 533 transitions. Second operand 6 states. [2020-10-29 13:14:53,478 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:14:54,757 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:14:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:14:55,154 INFO L93 Difference]: Finished difference Result 899 states and 1277 transitions. [2020-10-29 13:14:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:14:55,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-29 13:14:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:14:55,161 INFO L225 Difference]: With dead ends: 899 [2020-10-29 13:14:55,161 INFO L226 Difference]: Without dead ends: 576 [2020-10-29 13:14:55,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:14:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-10-29 13:14:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 554. [2020-10-29 13:14:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-29 13:14:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 786 transitions. [2020-10-29 13:14:55,271 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 786 transitions. Word has length 51 [2020-10-29 13:14:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:14:55,271 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 786 transitions. [2020-10-29 13:14:55,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:14:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 786 transitions. [2020-10-29 13:14:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 13:14:55,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:14:55,285 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] [2020-10-29 13:14:55,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:14:55,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:14:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:14:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash 725720351, now seen corresponding path program 1 times [2020-10-29 13:14:55,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:14:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168311994] [2020-10-29 13:14:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:14:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:14:55,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:55,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:56,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:14:59,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:00,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 13:15:00,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:15:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:15:00,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:00,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:00,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:15:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:00,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 13:15:00,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:00,913 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:00,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:00,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:00,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:00,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:00,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:15:00,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:00,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:00,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:00,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:00,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:00,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:00,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168311994] [2020-10-29 13:15:00,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:00,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:15:00,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471611652] [2020-10-29 13:15:00,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:15:00,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:15:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:15:00,957 INFO L87 Difference]: Start difference. First operand 554 states and 786 transitions. Second operand 7 states. [2020-10-29 13:15:01,450 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:15:02,738 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:15:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:03,256 INFO L93 Difference]: Finished difference Result 1133 states and 1660 transitions. [2020-10-29 13:15:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:15:03,257 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-29 13:15:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:03,263 INFO L225 Difference]: With dead ends: 1133 [2020-10-29 13:15:03,264 INFO L226 Difference]: Without dead ends: 739 [2020-10-29 13:15:03,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:15:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-29 13:15:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 554. [2020-10-29 13:15:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-29 13:15:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 784 transitions. [2020-10-29 13:15:03,321 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 784 transitions. Word has length 52 [2020-10-29 13:15:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:03,322 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 784 transitions. [2020-10-29 13:15:03,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:15:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 784 transitions. [2020-10-29 13:15:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:15:03,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:03,324 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] [2020-10-29 13:15:03,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:15:03,324 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1306243887, now seen corresponding path program 1 times [2020-10-29 13:15:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:03,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988144032] [2020-10-29 13:15:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:03,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:03,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:07,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:07,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:07,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:08,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:08,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:15:08,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:15:08,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:08,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:08,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:15:08,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:09,097 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:09,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:09,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:09,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:09,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:09,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:15:09,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:09,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:09,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:09,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988144032] [2020-10-29 13:15:09,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:09,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24346849] [2020-10-29 13:15:09,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:09,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:09,143 INFO L87 Difference]: Start difference. First operand 554 states and 784 transitions. Second operand 8 states. [2020-10-29 13:15:09,637 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-29 13:15:10,738 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:15:11,274 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:15:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:11,610 INFO L93 Difference]: Finished difference Result 1052 states and 1562 transitions. [2020-10-29 13:15:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:15:11,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-10-29 13:15:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:11,618 INFO L225 Difference]: With dead ends: 1052 [2020-10-29 13:15:11,619 INFO L226 Difference]: Without dead ends: 697 [2020-10-29 13:15:11,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:15:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-10-29 13:15:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 524. [2020-10-29 13:15:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-29 13:15:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 743 transitions. [2020-10-29 13:15:11,664 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 743 transitions. Word has length 53 [2020-10-29 13:15:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:11,665 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 743 transitions. [2020-10-29 13:15:11,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 743 transitions. [2020-10-29 13:15:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:15:11,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:11,668 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] [2020-10-29 13:15:11,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:15:11,669 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1614820578, now seen corresponding path program 1 times [2020-10-29 13:15:11,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:11,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003789019] [2020-10-29 13:15:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:11,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:11,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:12,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:13,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:13,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:14,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:16,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:16,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:15:16,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:17,452 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:17,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:17,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:17,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:17,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:17,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:15:17,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:17,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:17,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:17,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003789019] [2020-10-29 13:15:17,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:17,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:17,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75560365] [2020-10-29 13:15:17,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:17,500 INFO L87 Difference]: Start difference. First operand 524 states and 743 transitions. Second operand 8 states. [2020-10-29 13:15:17,938 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:15:19,107 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:15:19,552 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:20,459 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:20,889 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:21,005 INFO L93 Difference]: Finished difference Result 2197 states and 3257 transitions. [2020-10-29 13:15:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:15:21,009 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-29 13:15:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:21,019 INFO L225 Difference]: With dead ends: 2197 [2020-10-29 13:15:21,019 INFO L226 Difference]: Without dead ends: 1860 [2020-10-29 13:15:21,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:15:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2020-10-29 13:15:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 562. [2020-10-29 13:15:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2020-10-29 13:15:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 787 transitions. [2020-10-29 13:15:21,085 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 787 transitions. Word has length 54 [2020-10-29 13:15:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:21,085 INFO L481 AbstractCegarLoop]: Abstraction has 562 states and 787 transitions. [2020-10-29 13:15:21,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:21,086 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 787 transitions. [2020-10-29 13:15:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:15:21,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:21,087 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] [2020-10-29 13:15:21,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:15:21,087 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash 719050979, now seen corresponding path program 1 times [2020-10-29 13:15:21,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:21,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968696689] [2020-10-29 13:15:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:21,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:22,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:23,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:24,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:26,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:15:26,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:15:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:15:26,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:26,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:15:26,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:15:26,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:26,774 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:26,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:26,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:26,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:26,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:26,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:15:26,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:26,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:15:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:26,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:15:26,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:26,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968696689] [2020-10-29 13:15:26,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:26,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:26,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392090049] [2020-10-29 13:15:26,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:26,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:26,843 INFO L87 Difference]: Start difference. First operand 562 states and 787 transitions. Second operand 9 states. [2020-10-29 13:15:27,303 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:15:28,616 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:29,659 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:29,862 INFO L93 Difference]: Finished difference Result 2151 states and 3170 transitions. [2020-10-29 13:15:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:15:29,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-29 13:15:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:29,873 INFO L225 Difference]: With dead ends: 2151 [2020-10-29 13:15:29,873 INFO L226 Difference]: Without dead ends: 1793 [2020-10-29 13:15:29,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:15:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-10-29 13:15:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 586. [2020-10-29 13:15:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586 states. [2020-10-29 13:15:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 815 transitions. [2020-10-29 13:15:29,957 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 815 transitions. Word has length 55 [2020-10-29 13:15:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:29,957 INFO L481 AbstractCegarLoop]: Abstraction has 586 states and 815 transitions. [2020-10-29 13:15:29,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 815 transitions. [2020-10-29 13:15:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:15:29,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:29,959 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] [2020-10-29 13:15:29,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:15:29,959 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:29,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1418679702, now seen corresponding path program 1 times [2020-10-29 13:15:29,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:29,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613925486] [2020-10-29 13:15:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:29,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:31,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:31,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:31,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:32,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:34,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:34,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:15:34,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:15:34,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:15:34,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:34,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:34,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:15:34,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:15:34,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 13:15:34,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:35,555 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:35,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:35,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:35,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:35,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:35,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:35,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:15:35,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:35,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:35,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:35,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:35,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613925486] [2020-10-29 13:15:35,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:35,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:15:35,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252720398] [2020-10-29 13:15:35,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:15:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:15:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:15:35,599 INFO L87 Difference]: Start difference. First operand 586 states and 815 transitions. Second operand 6 states. [2020-10-29 13:15:36,071 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:38,424 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:38,912 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:39,089 INFO L93 Difference]: Finished difference Result 3430 states and 5127 transitions. [2020-10-29 13:15:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:39,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 13:15:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:39,106 INFO L225 Difference]: With dead ends: 3430 [2020-10-29 13:15:39,106 INFO L226 Difference]: Without dead ends: 3097 [2020-10-29 13:15:39,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:15:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2020-10-29 13:15:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 1686. [2020-10-29 13:15:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1686 states. [2020-10-29 13:15:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2459 transitions. [2020-10-29 13:15:39,310 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2459 transitions. Word has length 55 [2020-10-29 13:15:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:39,310 INFO L481 AbstractCegarLoop]: Abstraction has 1686 states and 2459 transitions. [2020-10-29 13:15:39,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:15:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2459 transitions. [2020-10-29 13:15:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:15:39,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:39,312 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] [2020-10-29 13:15:39,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:15:39,313 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash -58981995, now seen corresponding path program 1 times [2020-10-29 13:15:39,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:39,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965867988] [2020-10-29 13:15:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:39,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:39,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:43,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:44,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:44,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:15:44,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-29 13:15:44,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:15:44,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:44,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:15:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:15:44,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:44,885 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:44,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:44,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:44,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:44,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:15:44,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:44,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:44,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:44,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:15:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:44,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965867988] [2020-10-29 13:15:44,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:44,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:15:44,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412151986] [2020-10-29 13:15:44,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:15:44,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:15:44,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:15:44,940 INFO L87 Difference]: Start difference. First operand 1686 states and 2459 transitions. Second operand 8 states. [2020-10-29 13:15:45,913 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 173 [2020-10-29 13:15:47,495 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:15:48,539 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 171 [2020-10-29 13:15:50,522 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:15:51,485 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 170 [2020-10-29 13:15:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:52,389 INFO L93 Difference]: Finished difference Result 10658 states and 16041 transitions. [2020-10-29 13:15:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 13:15:52,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-29 13:15:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:52,433 INFO L225 Difference]: With dead ends: 10658 [2020-10-29 13:15:52,433 INFO L226 Difference]: Without dead ends: 9232 [2020-10-29 13:15:52,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-10-29 13:15:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2020-10-29 13:15:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 1592. [2020-10-29 13:15:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2020-10-29 13:15:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 2323 transitions. [2020-10-29 13:15:52,760 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 2323 transitions. Word has length 55 [2020-10-29 13:15:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:52,761 INFO L481 AbstractCegarLoop]: Abstraction has 1592 states and 2323 transitions. [2020-10-29 13:15:52,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:15:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 2323 transitions. [2020-10-29 13:15:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:15:52,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:52,763 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] [2020-10-29 13:15:52,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:15:52,763 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1705406796, now seen corresponding path program 1 times [2020-10-29 13:15:52,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:52,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873268046] [2020-10-29 13:15:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:52,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:52,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:53,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:53,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:15:53,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:15:53,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1137 [2020-10-29 13:15:53,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:53,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:53,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:15:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:15:53,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:15:53,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,469 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:15:54,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:15:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:54,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:54,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:15:54,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:15:54,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:15:54,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:15:54,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:15:54,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:15:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:15:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:15:54,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:15:54,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:15:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:15:54,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873268046] [2020-10-29 13:15:54,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:15:54,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:15:54,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976993200] [2020-10-29 13:15:54,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:15:54,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:15:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:15:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:15:54,507 INFO L87 Difference]: Start difference. First operand 1592 states and 2323 transitions. Second operand 9 states. [2020-10-29 13:15:55,018 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:15:56,353 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:15:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:15:57,199 INFO L93 Difference]: Finished difference Result 2875 states and 4276 transitions. [2020-10-29 13:15:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:15:57,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-29 13:15:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:15:57,216 INFO L225 Difference]: With dead ends: 2875 [2020-10-29 13:15:57,216 INFO L226 Difference]: Without dead ends: 2868 [2020-10-29 13:15:57,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:15:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2020-10-29 13:15:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1587. [2020-10-29 13:15:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1587 states. [2020-10-29 13:15:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2312 transitions. [2020-10-29 13:15:57,457 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2312 transitions. Word has length 56 [2020-10-29 13:15:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:15:57,457 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 2312 transitions. [2020-10-29 13:15:57,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:15:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2312 transitions. [2020-10-29 13:15:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:15:57,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:15:57,459 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] [2020-10-29 13:15:57,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:15:57,460 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:15:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:15:57,460 INFO L82 PathProgramCache]: Analyzing trace with hash 867709920, now seen corresponding path program 1 times [2020-10-29 13:15:57,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:15:57,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719223308] [2020-10-29 13:15:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:15:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:15:57,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:57,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:15:58,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:00,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:16:00,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:16:00,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:00,670 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:00,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:00,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:00,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:00,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:00,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:00,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:16:00,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:00,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:00,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:00,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719223308] [2020-10-29 13:16:00,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:00,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:16:00,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635992329] [2020-10-29 13:16:00,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:16:00,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:16:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:16:00,705 INFO L87 Difference]: Start difference. First operand 1587 states and 2312 transitions. Second operand 9 states. [2020-10-29 13:16:01,224 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:03,935 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:16:04,484 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-29 13:16:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:04,653 INFO L93 Difference]: Finished difference Result 2834 states and 4229 transitions. [2020-10-29 13:16:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:16:04,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-29 13:16:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:04,664 INFO L225 Difference]: With dead ends: 2834 [2020-10-29 13:16:04,664 INFO L226 Difference]: Without dead ends: 2818 [2020-10-29 13:16:04,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:16:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2020-10-29 13:16:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 1573. [2020-10-29 13:16:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2020-10-29 13:16:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 2293 transitions. [2020-10-29 13:16:04,901 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 2293 transitions. Word has length 56 [2020-10-29 13:16:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:04,901 INFO L481 AbstractCegarLoop]: Abstraction has 1573 states and 2293 transitions. [2020-10-29 13:16:04,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:16:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 2293 transitions. [2020-10-29 13:16:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:16:04,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:04,905 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] [2020-10-29 13:16:04,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:16:04,905 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 235258603, now seen corresponding path program 1 times [2020-10-29 13:16:04,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:04,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470429517] [2020-10-29 13:16:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:04,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:04,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:04,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:09,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:09,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:09,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:16:09,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,387 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:10,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:10,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:10,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:10,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:10,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:10,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:16:10,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:10,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:10,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:10,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:10,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470429517] [2020-10-29 13:16:10,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:10,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:10,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984928357] [2020-10-29 13:16:10,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:10,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:10,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:10,425 INFO L87 Difference]: Start difference. First operand 1573 states and 2293 transitions. Second operand 6 states. [2020-10-29 13:16:10,899 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:12,345 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:16:12,781 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:16:13,336 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:16:13,792 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:16:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:14,271 INFO L93 Difference]: Finished difference Result 9079 states and 13921 transitions. [2020-10-29 13:16:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:16:14,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-29 13:16:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:14,293 INFO L225 Difference]: With dead ends: 9079 [2020-10-29 13:16:14,294 INFO L226 Difference]: Without dead ends: 7828 [2020-10-29 13:16:14,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:16:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7828 states. [2020-10-29 13:16:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7828 to 2821. [2020-10-29 13:16:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2821 states. [2020-10-29 13:16:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4165 transitions. [2020-10-29 13:16:14,723 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4165 transitions. Word has length 73 [2020-10-29 13:16:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:14,724 INFO L481 AbstractCegarLoop]: Abstraction has 2821 states and 4165 transitions. [2020-10-29 13:16:14,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4165 transitions. [2020-10-29 13:16:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:14,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:14,730 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] [2020-10-29 13:16:14,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:16:14,730 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash 456464953, now seen corresponding path program 1 times [2020-10-29 13:16:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:14,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105155213] [2020-10-29 13:16:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:14,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:14,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:15,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:18,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:19,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:19,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:19,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:16:19,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:16:19,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:19,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:19,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:16:19,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:16:19,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:16:19,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:20,387 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:20,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:20,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:20,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:16:20,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:20,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105155213] [2020-10-29 13:16:20,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:20,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:16:20,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839378579] [2020-10-29 13:16:20,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:16:20,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:16:20,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:20,460 INFO L87 Difference]: Start difference. First operand 2821 states and 4165 transitions. Second operand 8 states. [2020-10-29 13:16:20,948 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:22,631 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:16:23,146 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:16:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:24,601 INFO L93 Difference]: Finished difference Result 12941 states and 19275 transitions. [2020-10-29 13:16:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:16:24,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-29 13:16:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:24,625 INFO L225 Difference]: With dead ends: 12941 [2020-10-29 13:16:24,625 INFO L226 Difference]: Without dead ends: 10442 [2020-10-29 13:16:24,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:16:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2020-10-29 13:16:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 5701. [2020-10-29 13:16:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5701 states. [2020-10-29 13:16:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8485 transitions. [2020-10-29 13:16:25,461 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8485 transitions. Word has length 75 [2020-10-29 13:16:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:25,462 INFO L481 AbstractCegarLoop]: Abstraction has 5701 states and 8485 transitions. [2020-10-29 13:16:25,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:16:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8485 transitions. [2020-10-29 13:16:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:25,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:25,468 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] [2020-10-29 13:16:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:16:25,468 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1299715896, now seen corresponding path program 1 times [2020-10-29 13:16:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:25,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887692241] [2020-10-29 13:16:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:25,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:25,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:25,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:25,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:26,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:30,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:30,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:30,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:16:30,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:16:30,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:30,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:16:30,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:16:30,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:31,015 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:31,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:31,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:31,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:31,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:31,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887692241] [2020-10-29 13:16:31,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:31,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:31,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145995204] [2020-10-29 13:16:31,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:31,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:31,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:31,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:31,063 INFO L87 Difference]: Start difference. First operand 5701 states and 8485 transitions. Second operand 6 states. [2020-10-29 13:16:31,628 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:16:33,247 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:16:33,834 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-29 13:16:34,310 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:35,712 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:16:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:36,410 INFO L93 Difference]: Finished difference Result 21847 states and 32881 transitions. [2020-10-29 13:16:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:16:36,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:16:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:36,448 INFO L225 Difference]: With dead ends: 21847 [2020-10-29 13:16:36,449 INFO L226 Difference]: Without dead ends: 16468 [2020-10-29 13:16:36,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:16:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16468 states. [2020-10-29 13:16:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16468 to 5701. [2020-10-29 13:16:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5701 states. [2020-10-29 13:16:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8421 transitions. [2020-10-29 13:16:37,387 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8421 transitions. Word has length 75 [2020-10-29 13:16:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:37,387 INFO L481 AbstractCegarLoop]: Abstraction has 5701 states and 8421 transitions. [2020-10-29 13:16:37,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:16:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8421 transitions. [2020-10-29 13:16:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:37,393 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] [2020-10-29 13:16:37,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:16:37,393 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1840696535, now seen corresponding path program 1 times [2020-10-29 13:16:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:37,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506385472] [2020-10-29 13:16:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:37,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:37,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:39,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:42,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:42,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:16:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:16:42,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:42,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:16:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:16:42,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:16:42,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:42,907 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:42,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:42,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:42,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:42,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:42,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:42,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:42,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:42,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:42,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:42,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506385472] [2020-10-29 13:16:42,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:42,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:16:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043709511] [2020-10-29 13:16:42,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:16:42,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:16:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:16:42,940 INFO L87 Difference]: Start difference. First operand 5701 states and 8421 transitions. Second operand 5 states. [2020-10-29 13:16:43,484 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:16:45,236 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:46,295 INFO L93 Difference]: Finished difference Result 15755 states and 23337 transitions. [2020-10-29 13:16:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:16:46,296 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-29 13:16:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:46,318 INFO L225 Difference]: With dead ends: 15755 [2020-10-29 13:16:46,318 INFO L226 Difference]: Without dead ends: 10376 [2020-10-29 13:16:46,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:16:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2020-10-29 13:16:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10245. [2020-10-29 13:16:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10245 states. [2020-10-29 13:16:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 14821 transitions. [2020-10-29 13:16:47,939 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 14821 transitions. Word has length 75 [2020-10-29 13:16:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:16:47,940 INFO L481 AbstractCegarLoop]: Abstraction has 10245 states and 14821 transitions. [2020-10-29 13:16:47,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:16:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 14821 transitions. [2020-10-29 13:16:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-29 13:16:47,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:16:47,947 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] [2020-10-29 13:16:47,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:16:47,948 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:16:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:16:47,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1372077875, now seen corresponding path program 1 times [2020-10-29 13:16:47,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:16:47,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995409150] [2020-10-29 13:16:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:16:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:47,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:49,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:52,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:52,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:52,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-29 13:16:52,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:16:52,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:16:52,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:52,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:16:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:16:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:16:52,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:53,434 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:16:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:16:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:16:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:16:53,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:16:53,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:16:53,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:16:53,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:16:53,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:16:53,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:16:53,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:16:53,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:16:53,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:16:53,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:16:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:16:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995409150] [2020-10-29 13:16:53,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:16:53,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:16:53,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081818015] [2020-10-29 13:16:53,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:16:53,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:16:53,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:16:53,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:16:53,460 INFO L87 Difference]: Start difference. First operand 10245 states and 14821 transitions. Second operand 6 states. [2020-10-29 13:16:53,968 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:16:55,618 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:16:56,167 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-29 13:16:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:16:58,334 INFO L93 Difference]: Finished difference Result 29646 states and 43307 transitions. [2020-10-29 13:16:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:16:58,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-29 13:16:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:16:58,365 INFO L225 Difference]: With dead ends: 29646 [2020-10-29 13:16:58,365 INFO L226 Difference]: Without dead ends: 19723 [2020-10-29 13:16:58,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:16:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19723 states. [2020-10-29 13:17:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19723 to 19717. [2020-10-29 13:17:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19717 states. [2020-10-29 13:17:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19717 states to 19717 states and 28581 transitions. [2020-10-29 13:17:01,459 INFO L78 Accepts]: Start accepts. Automaton has 19717 states and 28581 transitions. Word has length 75 [2020-10-29 13:17:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:01,459 INFO L481 AbstractCegarLoop]: Abstraction has 19717 states and 28581 transitions. [2020-10-29 13:17:01,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 19717 states and 28581 transitions. [2020-10-29 13:17:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:01,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:01,467 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] [2020-10-29 13:17:01,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:17:01,467 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1336112086, now seen corresponding path program 1 times [2020-10-29 13:17:01,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:01,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197632089] [2020-10-29 13:17:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:01,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:01,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:02,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:02,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:02,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:06,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:06,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:06,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:17:06,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:17:06,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:06,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:17:06,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:17:06,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:06,984 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:06,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:06,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:06,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:06,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:06,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:06,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:17:07,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:07,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:07,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:07,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197632089] [2020-10-29 13:17:07,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:07,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:17:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094299361] [2020-10-29 13:17:07,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:07,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:07,019 INFO L87 Difference]: Start difference. First operand 19717 states and 28581 transitions. Second operand 6 states. [2020-10-29 13:17:07,516 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:17:10,277 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:17:10,730 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-29 13:17:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:14,292 INFO L93 Difference]: Finished difference Result 33077 states and 48209 transitions. [2020-10-29 13:17:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:17:14,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:17:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:14,325 INFO L225 Difference]: With dead ends: 33077 [2020-10-29 13:17:14,325 INFO L226 Difference]: Without dead ends: 27858 [2020-10-29 13:17:14,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:17:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27858 states. [2020-10-29 13:17:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27858 to 19717. [2020-10-29 13:17:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19717 states. [2020-10-29 13:17:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19717 states to 19717 states and 28453 transitions. [2020-10-29 13:17:17,568 INFO L78 Accepts]: Start accepts. Automaton has 19717 states and 28453 transitions. Word has length 76 [2020-10-29 13:17:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:17,568 INFO L481 AbstractCegarLoop]: Abstraction has 19717 states and 28453 transitions. [2020-10-29 13:17:17,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19717 states and 28453 transitions. [2020-10-29 13:17:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:17,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:17,574 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] [2020-10-29 13:17:17,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:17:17,574 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash 437343142, now seen corresponding path program 1 times [2020-10-29 13:17:17,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:17,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770808985] [2020-10-29 13:17:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:18,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:22,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:17:22,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:23,090 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:23,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:23,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:23,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:23,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:17:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:23,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770808985] [2020-10-29 13:17:23,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:23,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:17:23,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020491854] [2020-10-29 13:17:23,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:23,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:23,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:23,120 INFO L87 Difference]: Start difference. First operand 19717 states and 28453 transitions. Second operand 6 states. [2020-10-29 13:17:23,599 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-29 13:17:25,108 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-29 13:17:25,583 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-29 13:17:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:29,541 INFO L93 Difference]: Finished difference Result 40462 states and 58923 transitions. [2020-10-29 13:17:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:17:29,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:17:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:29,595 INFO L225 Difference]: With dead ends: 40462 [2020-10-29 13:17:29,595 INFO L226 Difference]: Without dead ends: 29963 [2020-10-29 13:17:29,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:17:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29963 states. [2020-10-29 13:17:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29963 to 29701. [2020-10-29 13:17:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29701 states. [2020-10-29 13:17:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29701 states to 29701 states and 42597 transitions. [2020-10-29 13:17:34,555 INFO L78 Accepts]: Start accepts. Automaton has 29701 states and 42597 transitions. Word has length 76 [2020-10-29 13:17:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:34,556 INFO L481 AbstractCegarLoop]: Abstraction has 29701 states and 42597 transitions. [2020-10-29 13:17:34,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29701 states and 42597 transitions. [2020-10-29 13:17:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 13:17:34,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:34,561 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] [2020-10-29 13:17:34,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:17:34,561 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash 823788739, now seen corresponding path program 1 times [2020-10-29 13:17:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:34,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921022499] [2020-10-29 13:17:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:34,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:35,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:39,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4542 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 13:17:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:39,609 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:39,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:39,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:17:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:17:39,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:39,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921022499] [2020-10-29 13:17:39,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:39,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:17:39,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385247137] [2020-10-29 13:17:39,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:17:39,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:17:39,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:17:39,649 INFO L87 Difference]: Start difference. First operand 29701 states and 42597 transitions. Second operand 6 states. [2020-10-29 13:17:40,164 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:17:41,813 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:17:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:17:44,765 INFO L93 Difference]: Finished difference Result 44299 states and 63849 transitions. [2020-10-29 13:17:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:17:44,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2020-10-29 13:17:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:17:44,789 INFO L225 Difference]: With dead ends: 44299 [2020-10-29 13:17:44,790 INFO L226 Difference]: Without dead ends: 22107 [2020-10-29 13:17:44,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:17:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22107 states. [2020-10-29 13:17:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22107 to 14808. [2020-10-29 13:17:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14808 states. [2020-10-29 13:17:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14808 states to 14808 states and 21294 transitions. [2020-10-29 13:17:47,633 INFO L78 Accepts]: Start accepts. Automaton has 14808 states and 21294 transitions. Word has length 76 [2020-10-29 13:17:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:17:47,633 INFO L481 AbstractCegarLoop]: Abstraction has 14808 states and 21294 transitions. [2020-10-29 13:17:47,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:17:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 14808 states and 21294 transitions. [2020-10-29 13:17:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:17:47,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:17:47,636 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] [2020-10-29 13:17:47,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:17:47,637 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:17:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:17:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash 185774585, now seen corresponding path program 1 times [2020-10-29 13:17:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:17:47,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144541455] [2020-10-29 13:17:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:17:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:47,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:48,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:50,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:52,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:17:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:53,330 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:17:53,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:17:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:17:53,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:17:53,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:17:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:17:53,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:17:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:17:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:17:53,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144541455] [2020-10-29 13:17:53,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:17:53,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:17:53,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606443271] [2020-10-29 13:17:53,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:17:53,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:17:53,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:17:53,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:17:53,384 INFO L87 Difference]: Start difference. First operand 14808 states and 21294 transitions. Second operand 8 states. [2020-10-29 13:17:53,869 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-29 13:17:55,363 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-29 13:17:55,872 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-29 13:18:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:18:03,035 INFO L93 Difference]: Finished difference Result 53420 states and 76352 transitions. [2020-10-29 13:18:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:18:03,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-10-29 13:18:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:18:03,090 INFO L225 Difference]: With dead ends: 53420 [2020-10-29 13:18:03,090 INFO L226 Difference]: Without dead ends: 38825 [2020-10-29 13:18:03,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:18:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38825 states. [2020-10-29 13:18:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38825 to 18936. [2020-10-29 13:18:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18936 states. [2020-10-29 13:18:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18936 states to 18936 states and 26606 transitions. [2020-10-29 13:18:07,026 INFO L78 Accepts]: Start accepts. Automaton has 18936 states and 26606 transitions. Word has length 77 [2020-10-29 13:18:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:18:07,026 INFO L481 AbstractCegarLoop]: Abstraction has 18936 states and 26606 transitions. [2020-10-29 13:18:07,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:18:07,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18936 states and 26606 transitions. [2020-10-29 13:18:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:18:07,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:18:07,029 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] [2020-10-29 13:18:07,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:18:07,029 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:18:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:18:07,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1949291886, now seen corresponding path program 1 times [2020-10-29 13:18:07,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:18:07,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464551180] [2020-10-29 13:18:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:18:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:07,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:08,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:09,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:12,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:12,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:18:12,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:18:12,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:18:12,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:12,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:12,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:18:12,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:18:12,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:18:12,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:12,570 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-29 13:18:12,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:18:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:18:12,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:18:12,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:18:12,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:18:12,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:18:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:18:12,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464551180] [2020-10-29 13:18:12,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:18:12,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:18:12,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786276567] [2020-10-29 13:18:12,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:18:12,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:18:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:18:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:18:12,601 INFO L87 Difference]: Start difference. First operand 18936 states and 26606 transitions. Second operand 8 states. [2020-10-29 13:18:13,155 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-29 13:18:15,340 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 171