/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=DEEPEST --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-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:07:25,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:07:25,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:07:25,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:07:25,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:07:25,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:07:25,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:07:25,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:07:25,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:07:25,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:07:25,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:07:25,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:07:25,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:07:25,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:07:25,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:07:25,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:07:25,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:07:25,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:07:25,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:07:25,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:07:25,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:07:25,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:07:25,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:07:25,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:07:25,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:07:25,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:07:25,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:07:25,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:07:25,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:07:25,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:07:25,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:07:25,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:07:25,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:07:25,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:07:25,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:07:25,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:07:25,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:07:25,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:07:25,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:07:25,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:07:25,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:07:25,846 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:07:25,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:07:25,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:07:25,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:07:25,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:07:25,905 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:07:25,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:07:25,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:07:25,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:07:25,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:07:25,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:07:25,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:07:25,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:07:25,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:07:25,908 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:07:25,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:07:25,908 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:07:25,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:07:25,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:07:25,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:07:25,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:07:25,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:07:25,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:07:25,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:07:25,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:07:25,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:07:25,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:07:25,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:07:25,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:07:25,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:07:25,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:07:26,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:07:26,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:07:26,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:07:26,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:07:26,342 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:07:26,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 00:07:26,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5640b9fe/ee1c47737e304dd8868643d2fa47fe18/FLAG6b6c1294f [2020-10-28 00:07:27,444 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:07:27,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 00:07:27,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5640b9fe/ee1c47737e304dd8868643d2fa47fe18/FLAG6b6c1294f [2020-10-28 00:07:27,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5640b9fe/ee1c47737e304dd8868643d2fa47fe18 [2020-10-28 00:07:27,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:07:27,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:07:27,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:27,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:07:27,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:07:27,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:27" (1/1) ... [2020-10-28 00:07:27,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72327dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:27, skipping insertion in model container [2020-10-28 00:07:27,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:07:27" (1/1) ... [2020-10-28 00:07:27,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:07:28,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:07:29,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:29,381 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:07:29,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:07:29,813 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:07:29,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29 WrapperNode [2020-10-28 00:07:29,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:07:29,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:07:29,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:07:29,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:07:29,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:29,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:29,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:29,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:29,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:30,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:30,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... [2020-10-28 00:07:30,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:07:30,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:07:30,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:07:30,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:07:30,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:07:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:07:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:07:30,179 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:07:30,179 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:07:30,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:07:30,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:07:30,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:07:30,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:07:30,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:07:30,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:07:30,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:07:30,183 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:07:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:07:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:07:30,184 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:07:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:07:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:07:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:07:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:07:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:07:30,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:07:34,393 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:07:34,393 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:07:34,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:34 BoogieIcfgContainer [2020-10-28 00:07:34,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:07:34,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:07:34,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:07:34,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:07:34,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:07:27" (1/3) ... [2020-10-28 00:07:34,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2466b952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:34, skipping insertion in model container [2020-10-28 00:07:34,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:07:29" (2/3) ... [2020-10-28 00:07:34,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2466b952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:07:34, skipping insertion in model container [2020-10-28 00:07:34,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:07:34" (3/3) ... [2020-10-28 00:07:34,406 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-28 00:07:34,419 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:07:34,425 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:07:34,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:07:34,474 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:07:34,475 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:07:34,475 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:07:34,475 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:07:34,475 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:07:34,475 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:07:34,475 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:07:34,475 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:07:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states. [2020-10-28 00:07:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:07:34,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:34,548 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] [2020-10-28 00:07:34,549 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 273753204, now seen corresponding path program 1 times [2020-10-28 00:07:34,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:34,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470469490] [2020-10-28 00:07:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:35,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:35,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:40,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:07:40,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:07:40,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:07:40,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:40,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:07:40,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:07:40,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:07:42,168 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:07:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:42,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:42,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:42,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:42,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 00:07:42,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:42,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:42,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:42,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:42,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:07:42,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470469490] [2020-10-28 00:07:42,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:42,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:42,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489035370] [2020-10-28 00:07:42,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:42,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:42,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:42,323 INFO L87 Difference]: Start difference. First operand 1299 states. Second operand 6 states. [2020-10-28 00:07:44,465 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:07:58,843 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-28 00:08:05,074 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:08:05,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:05,426 INFO L93 Difference]: Finished difference Result 3574 states and 6101 transitions. [2020-10-28 00:08:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:08:05,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 00:08:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:05,470 INFO L225 Difference]: With dead ends: 3574 [2020-10-28 00:08:05,471 INFO L226 Difference]: Without dead ends: 2499 [2020-10-28 00:08:05,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2020-10-28 00:08:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2301. [2020-10-28 00:08:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2301 states. [2020-10-28 00:08:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 3001 transitions. [2020-10-28 00:08:05,681 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 3001 transitions. Word has length 57 [2020-10-28 00:08:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:05,682 INFO L481 AbstractCegarLoop]: Abstraction has 2301 states and 3001 transitions. [2020-10-28 00:08:05,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 3001 transitions. [2020-10-28 00:08:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:08:05,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:05,693 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] [2020-10-28 00:08:05,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:08:05,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:05,695 INFO L82 PathProgramCache]: Analyzing trace with hash 919223166, now seen corresponding path program 1 times [2020-10-28 00:08:05,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:05,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611858549] [2020-10-28 00:08:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:05,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:06,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:06,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:07,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:10,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:10,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:08:10,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:08:10,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 00:08:10,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:10,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:08:10,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:08:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:08:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 00:08:12,758 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:08:12,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:12,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:12,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:12,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:12,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:12,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:08:12,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:12,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:12,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:12,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:12,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:12,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611858549] [2020-10-28 00:08:12,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:12,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:08:12,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89536366] [2020-10-28 00:08:12,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:08:12,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:08:12,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:08:12,842 INFO L87 Difference]: Start difference. First operand 2301 states and 3001 transitions. Second operand 4 states. [2020-10-28 00:08:14,836 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:08:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:22,559 INFO L93 Difference]: Finished difference Result 3493 states and 4649 transitions. [2020-10-28 00:08:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:08:22,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 00:08:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:22,573 INFO L225 Difference]: With dead ends: 3493 [2020-10-28 00:08:22,573 INFO L226 Difference]: Without dead ends: 2528 [2020-10-28 00:08:22,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:08:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2020-10-28 00:08:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2522. [2020-10-28 00:08:22,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2522 states. [2020-10-28 00:08:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3314 transitions. [2020-10-28 00:08:22,766 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3314 transitions. Word has length 58 [2020-10-28 00:08:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:22,767 INFO L481 AbstractCegarLoop]: Abstraction has 2522 states and 3314 transitions. [2020-10-28 00:08:22,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:08:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3314 transitions. [2020-10-28 00:08:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:08:22,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:22,774 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] [2020-10-28 00:08:22,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:08:22,774 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1320308122, now seen corresponding path program 1 times [2020-10-28 00:08:22,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:22,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051849443] [2020-10-28 00:08:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:23,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:23,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:24,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:24,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:25,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:26,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:27,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:27,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:08:27,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:08:27,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 00:08:27,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:27,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:08:27,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 00:08:27,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:29,884 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:08:29,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:29,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:29,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:29,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:29,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:08:29,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:29,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:29,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051849443] [2020-10-28 00:08:29,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:29,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:08:29,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300421941] [2020-10-28 00:08:29,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:29,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:29,967 INFO L87 Difference]: Start difference. First operand 2522 states and 3314 transitions. Second operand 6 states. [2020-10-28 00:08:32,069 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:08:39,562 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-28 00:08:43,906 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:08:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:44,868 INFO L93 Difference]: Finished difference Result 4979 states and 6968 transitions. [2020-10-28 00:08:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:08:44,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:08:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:44,891 INFO L225 Difference]: With dead ends: 4979 [2020-10-28 00:08:44,892 INFO L226 Difference]: Without dead ends: 4474 [2020-10-28 00:08:44,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2020-10-28 00:08:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 3493. [2020-10-28 00:08:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3493 states. [2020-10-28 00:08:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 4675 transitions. [2020-10-28 00:08:45,051 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 4675 transitions. Word has length 58 [2020-10-28 00:08:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:45,052 INFO L481 AbstractCegarLoop]: Abstraction has 3493 states and 4675 transitions. [2020-10-28 00:08:45,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 4675 transitions. [2020-10-28 00:08:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:08:45,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:45,057 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] [2020-10-28 00:08:45,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:08:45,058 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 304606119, now seen corresponding path program 1 times [2020-10-28 00:08:45,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:45,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552309739] [2020-10-28 00:08:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:45,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:48,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:48,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:49,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:49,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:49,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:50,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:50,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:08:50,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:08:50,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:08:50,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:50,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:08:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:08:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:52,061 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:08:52,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:52,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:52,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:52,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:52,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 00:08:52,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:52,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:52,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:52,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:52,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:08:52,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552309739] [2020-10-28 00:08:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:52,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:08:52,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530894885] [2020-10-28 00:08:52,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:52,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:52,155 INFO L87 Difference]: Start difference. First operand 3493 states and 4675 transitions. Second operand 6 states. [2020-10-28 00:08:54,083 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:09:02,440 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 531 [2020-10-28 00:09:04,308 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:09:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:05,666 INFO L93 Difference]: Finished difference Result 12293 states and 17867 transitions. [2020-10-28 00:09:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:09:05,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 00:09:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:05,717 INFO L225 Difference]: With dead ends: 12293 [2020-10-28 00:09:05,717 INFO L226 Difference]: Without dead ends: 10190 [2020-10-28 00:09:05,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:09:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2020-10-28 00:09:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 6353. [2020-10-28 00:09:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6353 states. [2020-10-28 00:09:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6353 states to 6353 states and 8983 transitions. [2020-10-28 00:09:06,056 INFO L78 Accepts]: Start accepts. Automaton has 6353 states and 8983 transitions. Word has length 58 [2020-10-28 00:09:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:06,056 INFO L481 AbstractCegarLoop]: Abstraction has 6353 states and 8983 transitions. [2020-10-28 00:09:06,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:09:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6353 states and 8983 transitions. [2020-10-28 00:09:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:06,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:06,063 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] [2020-10-28 00:09:06,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:09:06,063 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash -761155748, now seen corresponding path program 1 times [2020-10-28 00:09:06,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:06,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49374916] [2020-10-28 00:09:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:11,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:11,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:09:11,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-28 00:09:11,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:09:11,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:09:11,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 00:09:11,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:13,294 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:09:13,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:13,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:13,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:13,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:13,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:13,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:09:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:13,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:13,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49374916] [2020-10-28 00:09:13,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:13,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:09:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413824008] [2020-10-28 00:09:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:09:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:09:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:09:13,386 INFO L87 Difference]: Start difference. First operand 6353 states and 8983 transitions. Second operand 10 states. [2020-10-28 00:09:15,303 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:09:22,648 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 532 [2020-10-28 00:09:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:25,283 INFO L93 Difference]: Finished difference Result 19606 states and 29210 transitions. [2020-10-28 00:09:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:09:25,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 00:09:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:25,347 INFO L225 Difference]: With dead ends: 19606 [2020-10-28 00:09:25,348 INFO L226 Difference]: Without dead ends: 15895 [2020-10-28 00:09:25,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:09:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2020-10-28 00:09:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 6341. [2020-10-28 00:09:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6341 states. [2020-10-28 00:09:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6341 states to 6341 states and 8966 transitions. [2020-10-28 00:09:25,727 INFO L78 Accepts]: Start accepts. Automaton has 6341 states and 8966 transitions. Word has length 60 [2020-10-28 00:09:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:25,728 INFO L481 AbstractCegarLoop]: Abstraction has 6341 states and 8966 transitions. [2020-10-28 00:09:25,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:09:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6341 states and 8966 transitions. [2020-10-28 00:09:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:25,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:25,734 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] [2020-10-28 00:09:25,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:09:25,734 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:25,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1603416637, now seen corresponding path program 1 times [2020-10-28 00:09:25,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:25,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169052484] [2020-10-28 00:09:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:25,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:25,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:26,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:26,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:27,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:28,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:30,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:30,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:30,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:09:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:09:30,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:30,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:09:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:30,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:09:30,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:33,008 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:09:33,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:33,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:33,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:33,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:09:33,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:33,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:33,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169052484] [2020-10-28 00:09:33,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:33,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:09:33,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821683767] [2020-10-28 00:09:33,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:09:33,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:09:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:09:33,068 INFO L87 Difference]: Start difference. First operand 6341 states and 8966 transitions. Second operand 10 states. [2020-10-28 00:09:34,959 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:09:41,646 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 532 [2020-10-28 00:09:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:44,390 INFO L93 Difference]: Finished difference Result 16355 states and 24161 transitions. [2020-10-28 00:09:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:09:44,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 00:09:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:44,436 INFO L225 Difference]: With dead ends: 16355 [2020-10-28 00:09:44,436 INFO L226 Difference]: Without dead ends: 16350 [2020-10-28 00:09:44,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:09:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16350 states. [2020-10-28 00:09:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16350 to 6338. [2020-10-28 00:09:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6338 states. [2020-10-28 00:09:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6338 states to 6338 states and 8961 transitions. [2020-10-28 00:09:44,935 INFO L78 Accepts]: Start accepts. Automaton has 6338 states and 8961 transitions. Word has length 60 [2020-10-28 00:09:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:44,935 INFO L481 AbstractCegarLoop]: Abstraction has 6338 states and 8961 transitions. [2020-10-28 00:09:44,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:09:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6338 states and 8961 transitions. [2020-10-28 00:09:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:09:44,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:44,942 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] [2020-10-28 00:09:44,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:09:44,942 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash 949159653, now seen corresponding path program 1 times [2020-10-28 00:09:44,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:44,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174137980] [2020-10-28 00:09:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:45,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:46,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:49,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:50,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:50,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:09:50,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:09:50,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:09:50,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:09:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:09:50,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:52,104 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:09:52,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:52,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:52,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:52,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:09:52,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174137980] [2020-10-28 00:09:52,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:52,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:09:52,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515074003] [2020-10-28 00:09:52,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:09:52,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:52,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:09:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:09:52,165 INFO L87 Difference]: Start difference. First operand 6338 states and 8961 transitions. Second operand 10 states. [2020-10-28 00:09:54,295 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 550 [2020-10-28 00:10:01,771 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:10:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:04,284 INFO L93 Difference]: Finished difference Result 13063 states and 19074 transitions. [2020-10-28 00:10:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:10:04,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 00:10:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:04,313 INFO L225 Difference]: With dead ends: 13063 [2020-10-28 00:10:04,313 INFO L226 Difference]: Without dead ends: 13058 [2020-10-28 00:10:04,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:10:04,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13058 states. [2020-10-28 00:10:04,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13058 to 6350. [2020-10-28 00:10:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6350 states. [2020-10-28 00:10:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6350 states to 6350 states and 8980 transitions. [2020-10-28 00:10:04,705 INFO L78 Accepts]: Start accepts. Automaton has 6350 states and 8980 transitions. Word has length 60 [2020-10-28 00:10:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:04,706 INFO L481 AbstractCegarLoop]: Abstraction has 6350 states and 8980 transitions. [2020-10-28 00:10:04,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:10:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6350 states and 8980 transitions. [2020-10-28 00:10:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 00:10:04,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:04,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:04,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:10:04,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 648054551, now seen corresponding path program 1 times [2020-10-28 00:10:04,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:04,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444246357] [2020-10-28 00:10:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:04,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:04,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:05,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:10:09,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:10:09,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:11,704 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:10:11,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:11,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:11,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:11,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:11,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:10:11,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:11,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:11,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444246357] [2020-10-28 00:10:11,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:11,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:11,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906439785] [2020-10-28 00:10:11,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:11,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:11,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:11,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:11,772 INFO L87 Difference]: Start difference. First operand 6350 states and 8980 transitions. Second operand 4 states. [2020-10-28 00:10:18,276 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 534 [2020-10-28 00:10:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:19,074 INFO L93 Difference]: Finished difference Result 11959 states and 17459 transitions. [2020-10-28 00:10:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:19,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 00:10:19,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:19,093 INFO L225 Difference]: With dead ends: 11959 [2020-10-28 00:10:19,093 INFO L226 Difference]: Without dead ends: 7496 [2020-10-28 00:10:19,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2020-10-28 00:10:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 7493. [2020-10-28 00:10:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7493 states. [2020-10-28 00:10:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7493 states to 7493 states and 10591 transitions. [2020-10-28 00:10:19,652 INFO L78 Accepts]: Start accepts. Automaton has 7493 states and 10591 transitions. Word has length 61 [2020-10-28 00:10:19,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:19,653 INFO L481 AbstractCegarLoop]: Abstraction has 7493 states and 10591 transitions. [2020-10-28 00:10:19,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7493 states and 10591 transitions. [2020-10-28 00:10:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 00:10:19,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:19,658 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] [2020-10-28 00:10:19,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:10:19,658 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:19,659 INFO L82 PathProgramCache]: Analyzing trace with hash 578848402, now seen corresponding path program 1 times [2020-10-28 00:10:19,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:19,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102022248] [2020-10-28 00:10:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:19,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:24,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:24,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 00:10:24,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:10:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:10:24,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:10:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:10:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:10:24,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:26,712 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:10:26,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:26,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:26,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:26,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:26,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:26,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 00:10:26,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:26,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:26,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:26,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102022248] [2020-10-28 00:10:26,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:26,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:10:26,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915150538] [2020-10-28 00:10:26,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:10:26,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:10:26,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:10:26,782 INFO L87 Difference]: Start difference. First operand 7493 states and 10591 transitions. Second operand 11 states. [2020-10-28 00:10:28,750 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 530 [2020-10-28 00:10:38,225 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-28 00:10:40,327 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 542 [2020-10-28 00:10:42,503 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 534 [2020-10-28 00:10:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:45,822 INFO L93 Difference]: Finished difference Result 34123 states and 49284 transitions. [2020-10-28 00:10:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 00:10:45,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-10-28 00:10:45,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:45,910 INFO L225 Difference]: With dead ends: 34123 [2020-10-28 00:10:45,910 INFO L226 Difference]: Without dead ends: 34118 [2020-10-28 00:10:45,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 00:10:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34118 states. [2020-10-28 00:10:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34118 to 7478. [2020-10-28 00:10:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7478 states. [2020-10-28 00:10:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 10567 transitions. [2020-10-28 00:10:46,625 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 10567 transitions. Word has length 63 [2020-10-28 00:10:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:46,625 INFO L481 AbstractCegarLoop]: Abstraction has 7478 states and 10567 transitions. [2020-10-28 00:10:46,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:10:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 10567 transitions. [2020-10-28 00:10:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:10:46,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:46,634 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] [2020-10-28 00:10:46,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:10:46,634 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:46,635 INFO L82 PathProgramCache]: Analyzing trace with hash 453301637, now seen corresponding path program 1 times [2020-10-28 00:10:46,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:46,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838341517] [2020-10-28 00:10:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:46,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:46,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:46,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:47,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:51,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:51,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:10:51,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:10:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:10:51,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:10:51,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:10:51,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:53,683 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 529 [2020-10-28 00:10:53,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:53,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:53,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:53,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:53,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:53,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:10:53,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:53,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:53,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:53,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:53,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:10:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838341517] [2020-10-28 00:10:53,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:53,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693960085] [2020-10-28 00:10:53,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:53,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:53,754 INFO L87 Difference]: Start difference. First operand 7478 states and 10567 transitions. Second operand 4 states. [2020-10-28 00:10:55,694 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 532