/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_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:31:17,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:31:17,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:31:17,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:31:17,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:31:17,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:31:17,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:31:17,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:31:17,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:31:17,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:31:17,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:31:17,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:31:17,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:31:17,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:31:17,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:31:17,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:31:17,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:31:17,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:31:17,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:31:17,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:31:17,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:31:17,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:31:17,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:31:17,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:31:17,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:31:17,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:31:17,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:31:17,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:31:17,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:31:17,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:31:17,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:31:17,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:31:17,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:31:17,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:31:17,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:31:17,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:31:17,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:31:17,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:31:17,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:31:17,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:31:17,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:31:17,871 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 [2020-10-27 23:31:17,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:31:17,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:31:17,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:31:17,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:31:17,901 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:31:17,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:31:17,901 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:31:17,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:31:17,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:31:17,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:31:17,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:31:17,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:31:17,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:31:17,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:31:17,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:31:17,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:31:17,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:31:17,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:31:17,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:31:17,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:31:17,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:31:17,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:31:17,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:31:17,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:31:17,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:31:17,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:31:17,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:31:17,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:31:17,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:31:17,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:31:18,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:31:18,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:31:18,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:31:18,351 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:31:18,352 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:31:18,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:31:18,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fed2afa34/2fdceb6b37a74797947b281a2c97595a/FLAG826a8f9ae [2020-10-27 23:31:19,339 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:31:19,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:31:19,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fed2afa34/2fdceb6b37a74797947b281a2c97595a/FLAG826a8f9ae [2020-10-27 23:31:19,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fed2afa34/2fdceb6b37a74797947b281a2c97595a [2020-10-27 23:31:19,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:31:19,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:31:19,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:31:19,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:31:19,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:31:19,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:31:19" (1/1) ... [2020-10-27 23:31:19,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112de60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:19, skipping insertion in model container [2020-10-27 23:31:19,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:31:19" (1/1) ... [2020-10-27 23:31:19,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:31:19,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:31:20,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:31:21,011 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:31:21,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:31:21,784 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:31:21,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21 WrapperNode [2020-10-27 23:31:21,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:31:21,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:31:21,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:31:21,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:31:21,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:21,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:21,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:21,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:21,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:21,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:22,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (1/1) ... [2020-10-27 23:31:22,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:31:22,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:31:22,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:31:22,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:31:22,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (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 [2020-10-27 23:31:22,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:31:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:31:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:31:22,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:31:22,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:31:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:31:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:31:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:31:22,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:31:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:31:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:31:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:31:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:31:22,129 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:31:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:31:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:31:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:31:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:31:22,130 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:31:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:31:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:31:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:31:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:31:22,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:31:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:31:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:31:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:31:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:31:22,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:31:25,388 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:31:25,388 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:31:25,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:31:25 BoogieIcfgContainer [2020-10-27 23:31:25,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:31:25,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:31:25,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:31:25,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:31:25,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:31:19" (1/3) ... [2020-10-27 23:31:25,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d99a6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:31:25, skipping insertion in model container [2020-10-27 23:31:25,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:31:21" (2/3) ... [2020-10-27 23:31:25,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d99a6c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:31:25, skipping insertion in model container [2020-10-27 23:31:25,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:31:25" (3/3) ... [2020-10-27 23:31:25,402 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:31:25,415 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:31:25,421 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:31:25,435 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:31:25,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:31:25,470 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:31:25,470 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:31:25,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:31:25,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:31:25,471 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:31:25,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:31:25,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:31:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states. [2020-10-27 23:31:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 23:31:25,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:25,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:31:25,549 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:25,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1678978365, now seen corresponding path program 1 times [2020-10-27 23:31:25,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:25,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354866180] [2020-10-27 23:31:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:26,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:27,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:27,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:28,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:30,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:30,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:30,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:30,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:31,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:31,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:31,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 23:31:31,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:31:31,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:31:31,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:31,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:31:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-27 23:31:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:31:32,535 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:31:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:32,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:32,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:32,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:32,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 23:31:32,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:32,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:32,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:31:32,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354866180] [2020-10-27 23:31:32,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:32,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:32,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117821237] [2020-10-27 23:31:32,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:32,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:32,873 INFO L87 Difference]: Start difference. First operand 938 states. Second operand 4 states. [2020-10-27 23:31:33,814 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:31:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:40,837 INFO L93 Difference]: Finished difference Result 1592 states and 2856 transitions. [2020-10-27 23:31:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:31:40,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-27 23:31:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:40,867 INFO L225 Difference]: With dead ends: 1592 [2020-10-27 23:31:40,867 INFO L226 Difference]: Without dead ends: 1326 [2020-10-27 23:31:40,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:31:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2020-10-27 23:31:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1323. [2020-10-27 23:31:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1323 states. [2020-10-27 23:31:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 2030 transitions. [2020-10-27 23:31:41,048 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 2030 transitions. Word has length 309 [2020-10-27 23:31:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:41,055 INFO L481 AbstractCegarLoop]: Abstraction has 1323 states and 2030 transitions. [2020-10-27 23:31:41,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 2030 transitions. [2020-10-27 23:31:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 23:31:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:41,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:31:41,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:31:41,075 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1664282388, now seen corresponding path program 1 times [2020-10-27 23:31:41,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:41,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361719283] [2020-10-27 23:31:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:41,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:42,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:42,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:42,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:42,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:43,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:43,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:43,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:43,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:44,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:44,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:44,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:46,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:46,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 23:31:46,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:31:46,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:31:46,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:31:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 23:31:46,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-27 23:31:46,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:47,329 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:31:47,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:31:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:47,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:47,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:31:47,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:31:47,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:31:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:31:47,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:31:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:31:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:31:47,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:31:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:31:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:31:47,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361719283] [2020-10-27 23:31:47,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:31:47,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:31:47,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868802820] [2020-10-27 23:31:47,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:31:47,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:31:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:31:47,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:31:47,556 INFO L87 Difference]: Start difference. First operand 1323 states and 2030 transitions. Second operand 4 states. [2020-10-27 23:31:48,472 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:31:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:31:55,063 INFO L93 Difference]: Finished difference Result 2522 states and 3906 transitions. [2020-10-27 23:31:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:31:55,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-27 23:31:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:31:55,077 INFO L225 Difference]: With dead ends: 2522 [2020-10-27 23:31:55,077 INFO L226 Difference]: Without dead ends: 2134 [2020-10-27 23:31:55,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:31:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2020-10-27 23:31:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 2131. [2020-10-27 23:31:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2131 states. [2020-10-27 23:31:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 3272 transitions. [2020-10-27 23:31:55,167 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 3272 transitions. Word has length 309 [2020-10-27 23:31:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:31:55,168 INFO L481 AbstractCegarLoop]: Abstraction has 2131 states and 3272 transitions. [2020-10-27 23:31:55,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:31:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 3272 transitions. [2020-10-27 23:31:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 23:31:55,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:31:55,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:31:55,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:31:55,178 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:31:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:31:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1928642284, now seen corresponding path program 1 times [2020-10-27 23:31:55,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:31:55,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102597365] [2020-10-27 23:31:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:31:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:31:55,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:55,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:56,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:57,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:57,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:57,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:57,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:31:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:00,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:00,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 23:32:00,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:32:00,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 23:32:00,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 23:32:00,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 216 [2020-10-27 23:32:00,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:32:01,292 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:32:01,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:01,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:32:01,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:01,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:32:01,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102597365] [2020-10-27 23:32:01,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:01,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:01,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174684057] [2020-10-27 23:32:01,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:01,532 INFO L87 Difference]: Start difference. First operand 2131 states and 3272 transitions. Second operand 4 states. [2020-10-27 23:32:02,428 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:32:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:09,288 INFO L93 Difference]: Finished difference Result 4388 states and 6815 transitions. [2020-10-27 23:32:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:32:09,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-27 23:32:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:09,315 INFO L225 Difference]: With dead ends: 4388 [2020-10-27 23:32:09,315 INFO L226 Difference]: Without dead ends: 3754 [2020-10-27 23:32:09,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2020-10-27 23:32:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3751. [2020-10-27 23:32:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3751 states. [2020-10-27 23:32:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 5760 transitions. [2020-10-27 23:32:09,462 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 5760 transitions. Word has length 309 [2020-10-27 23:32:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:09,463 INFO L481 AbstractCegarLoop]: Abstraction has 3751 states and 5760 transitions. [2020-10-27 23:32:09,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:32:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 5760 transitions. [2020-10-27 23:32:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 23:32:09,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:09,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:32:09,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:32:09,475 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -134237236, now seen corresponding path program 1 times [2020-10-27 23:32:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:09,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306513715] [2020-10-27 23:32:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:09,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:09,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:10,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:10,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:10,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:10,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:10,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:14,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:14,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 23:32:14,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:32:14,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 23:32:14,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 23:32:14,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-27 23:32:14,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:15,662 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:32:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:15,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:15,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:15,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:15,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:32:15,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306513715] [2020-10-27 23:32:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:15,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475686595] [2020-10-27 23:32:15,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:15,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:15,842 INFO L87 Difference]: Start difference. First operand 3751 states and 5760 transitions. Second operand 4 states. [2020-10-27 23:32:16,756 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2020-10-27 23:32:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:23,339 INFO L93 Difference]: Finished difference Result 8128 states and 12639 transitions. [2020-10-27 23:32:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:32:23,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-27 23:32:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:23,391 INFO L225 Difference]: With dead ends: 8128 [2020-10-27 23:32:23,391 INFO L226 Difference]: Without dead ends: 7002 [2020-10-27 23:32:23,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2020-10-27 23:32:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 6999. [2020-10-27 23:32:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6999 states. [2020-10-27 23:32:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 10744 transitions. [2020-10-27 23:32:23,719 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 10744 transitions. Word has length 309 [2020-10-27 23:32:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:23,720 INFO L481 AbstractCegarLoop]: Abstraction has 6999 states and 10744 transitions. [2020-10-27 23:32:23,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:32:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 10744 transitions. [2020-10-27 23:32:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 23:32:23,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:23,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:32:23,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:32:23,736 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -144734301, now seen corresponding path program 1 times [2020-10-27 23:32:23,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:23,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445589624] [2020-10-27 23:32:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:24,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:24,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:26,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:26,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:28,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:28,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 23:32:28,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:32:28,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:32:28,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:32:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:32:28,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 23:32:28,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:29,900 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:32:29,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:29,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:29,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:29,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:29,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:32:30,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445589624] [2020-10-27 23:32:30,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:30,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:32:30,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591246111] [2020-10-27 23:32:30,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:32:30,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:32:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:32:30,065 INFO L87 Difference]: Start difference. First operand 6999 states and 10744 transitions. Second operand 5 states. [2020-10-27 23:32:38,731 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 23:32:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:32:41,230 INFO L93 Difference]: Finished difference Result 20667 states and 31689 transitions. [2020-10-27 23:32:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:32:41,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2020-10-27 23:32:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:32:41,294 INFO L225 Difference]: With dead ends: 20667 [2020-10-27 23:32:41,294 INFO L226 Difference]: Without dead ends: 13709 [2020-10-27 23:32:41,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:32:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13709 states. [2020-10-27 23:32:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13709 to 13651. [2020-10-27 23:32:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13651 states. [2020-10-27 23:32:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13651 states to 13651 states and 20836 transitions. [2020-10-27 23:32:41,846 INFO L78 Accepts]: Start accepts. Automaton has 13651 states and 20836 transitions. Word has length 309 [2020-10-27 23:32:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:32:41,847 INFO L481 AbstractCegarLoop]: Abstraction has 13651 states and 20836 transitions. [2020-10-27 23:32:41,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:32:41,847 INFO L276 IsEmpty]: Start isEmpty. Operand 13651 states and 20836 transitions. [2020-10-27 23:32:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 23:32:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:32:41,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:32:41,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:32:41,878 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:32:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:32:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash -816094295, now seen corresponding path program 1 times [2020-10-27 23:32:41,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:32:41,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464070122] [2020-10-27 23:32:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:32:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:41,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:42,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:42,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:42,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:43,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:46,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:46,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:46,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 23:32:46,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:32:46,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 23:32:46,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:46,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:32:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 23:32:46,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 23:32:46,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:47,932 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:32:47,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:32:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:32:47,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:32:47,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:32:47,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:32:47,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:32:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:32:48,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464070122] [2020-10-27 23:32:48,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:32:48,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:32:48,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882526135] [2020-10-27 23:32:48,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:32:48,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:32:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:32:48,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:32:48,065 INFO L87 Difference]: Start difference. First operand 13651 states and 20836 transitions. Second operand 4 states. [2020-10-27 23:32:57,620 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:33:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:00,142 INFO L93 Difference]: Finished difference Result 40235 states and 61314 transitions. [2020-10-27 23:33:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:00,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 311 [2020-10-27 23:33:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:00,205 INFO L225 Difference]: With dead ends: 40235 [2020-10-27 23:33:00,205 INFO L226 Difference]: Without dead ends: 26707 [2020-10-27 23:33:00,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26707 states. [2020-10-27 23:33:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26707 to 26593. [2020-10-27 23:33:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26593 states. [2020-10-27 23:33:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26593 states to 26593 states and 40313 transitions. [2020-10-27 23:33:01,362 INFO L78 Accepts]: Start accepts. Automaton has 26593 states and 40313 transitions. Word has length 311 [2020-10-27 23:33:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:01,362 INFO L481 AbstractCegarLoop]: Abstraction has 26593 states and 40313 transitions. [2020-10-27 23:33:01,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 26593 states and 40313 transitions. [2020-10-27 23:33:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-10-27 23:33:01,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:01,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:33:01,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:33:01,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:01,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1127107388, now seen corresponding path program 1 times [2020-10-27 23:33:01,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:01,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990726370] [2020-10-27 23:33:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:01,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:01,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:01,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:06,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 23:33:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 23:33:06,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:07,410 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:33:07,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:07,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:07,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:07,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:07,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:07,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990726370] [2020-10-27 23:33:07,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:07,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:07,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105070699] [2020-10-27 23:33:07,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:07,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:07,527 INFO L87 Difference]: Start difference. First operand 26593 states and 40313 transitions. Second operand 4 states. [2020-10-27 23:33:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:14,584 INFO L93 Difference]: Finished difference Result 79597 states and 120624 transitions. [2020-10-27 23:33:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:33:14,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 311 [2020-10-27 23:33:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:14,701 INFO L225 Difference]: With dead ends: 79597 [2020-10-27 23:33:14,702 INFO L226 Difference]: Without dead ends: 53093 [2020-10-27 23:33:14,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53093 states. [2020-10-27 23:33:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53093 to 26616. [2020-10-27 23:33:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26616 states. [2020-10-27 23:33:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26616 states to 26616 states and 40345 transitions. [2020-10-27 23:33:16,622 INFO L78 Accepts]: Start accepts. Automaton has 26616 states and 40345 transitions. Word has length 311 [2020-10-27 23:33:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:16,622 INFO L481 AbstractCegarLoop]: Abstraction has 26616 states and 40345 transitions. [2020-10-27 23:33:16,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 26616 states and 40345 transitions. [2020-10-27 23:33:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 23:33:16,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:16,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:33:16,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:33:16,668 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash 451160764, now seen corresponding path program 1 times [2020-10-27 23:33:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:16,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538589294] [2020-10-27 23:33:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:16,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:16,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:17,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:18,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:21,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:21,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-27 23:33:21,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:33:21,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:33:21,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:33:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:33:21,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 23:33:21,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:22,674 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:33:22,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:22,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:22,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:22,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:22,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:22,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:33:22,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:22,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:22,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:22,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:22,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:22,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538589294] [2020-10-27 23:33:22,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:22,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:33:22,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053276017] [2020-10-27 23:33:22,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:33:22,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:33:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:33:22,859 INFO L87 Difference]: Start difference. First operand 26616 states and 40345 transitions. Second operand 4 states. [2020-10-27 23:33:33,517 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2020-10-27 23:33:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:35,686 INFO L93 Difference]: Finished difference Result 75672 states and 114541 transitions. [2020-10-27 23:33:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:35,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 312 [2020-10-27 23:33:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:35,806 INFO L225 Difference]: With dead ends: 75672 [2020-10-27 23:33:35,807 INFO L226 Difference]: Without dead ends: 49266 [2020-10-27 23:33:35,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49266 states. [2020-10-27 23:33:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49266 to 49184. [2020-10-27 23:33:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49184 states. [2020-10-27 23:33:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49184 states to 49184 states and 74025 transitions. [2020-10-27 23:33:38,379 INFO L78 Accepts]: Start accepts. Automaton has 49184 states and 74025 transitions. Word has length 312 [2020-10-27 23:33:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:38,380 INFO L481 AbstractCegarLoop]: Abstraction has 49184 states and 74025 transitions. [2020-10-27 23:33:38,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:33:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49184 states and 74025 transitions. [2020-10-27 23:33:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 23:33:38,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:38,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:33:38,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:33:38,431 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:38,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1988109183, now seen corresponding path program 1 times [2020-10-27 23:33:38,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:38,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861891132] [2020-10-27 23:33:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:33:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:38,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:38,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:38,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:39,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 320 [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:33:43,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 23:33:43,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:33:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:44,554 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:33:44,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:33:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:33:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:33:44,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:33:44,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:33:44,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:33:44,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:33:44,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:33:44,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:33:44,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:33:44,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:33:44,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:33:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:33:44,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861891132] [2020-10-27 23:33:44,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:33:44,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:33:44,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590517427] [2020-10-27 23:33:44,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:33:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:33:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:33:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:33:44,725 INFO L87 Difference]: Start difference. First operand 49184 states and 74025 transitions. Second operand 5 states. [2020-10-27 23:33:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:33:56,466 INFO L93 Difference]: Finished difference Result 143253 states and 215280 transitions. [2020-10-27 23:33:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:33:56,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 312 [2020-10-27 23:33:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:33:56,608 INFO L225 Difference]: With dead ends: 143253 [2020-10-27 23:33:56,609 INFO L226 Difference]: Without dead ends: 94778 [2020-10-27 23:33:56,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:33:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94778 states. [2020-10-27 23:33:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94778 to 49500. [2020-10-27 23:33:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49500 states. [2020-10-27 23:33:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49500 states to 49500 states and 74563 transitions. [2020-10-27 23:33:59,934 INFO L78 Accepts]: Start accepts. Automaton has 49500 states and 74563 transitions. Word has length 312 [2020-10-27 23:33:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:33:59,934 INFO L481 AbstractCegarLoop]: Abstraction has 49500 states and 74563 transitions. [2020-10-27 23:33:59,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:33:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 49500 states and 74563 transitions. [2020-10-27 23:33:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-10-27 23:33:59,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:33:59,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:33:59,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:33:59,984 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:33:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:33:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash 637659716, now seen corresponding path program 1 times [2020-10-27 23:33:59,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:33:59,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128859782] [2020-10-27 23:33:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:00,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:00,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:01,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:05,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 23:34:05,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:34:05,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:05,964 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:34:05,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:05,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:05,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:05,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:05,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:34:05,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:05,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:05,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:06,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128859782] [2020-10-27 23:34:06,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:06,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:34:06,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595283840] [2020-10-27 23:34:06,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:34:06,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:34:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:06,068 INFO L87 Difference]: Start difference. First operand 49500 states and 74563 transitions. Second operand 5 states. [2020-10-27 23:34:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:14,247 INFO L93 Difference]: Finished difference Result 94752 states and 142423 transitions. [2020-10-27 23:34:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:34:14,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 314 [2020-10-27 23:34:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:14,309 INFO L225 Difference]: With dead ends: 94752 [2020-10-27 23:34:14,310 INFO L226 Difference]: Without dead ends: 46381 [2020-10-27 23:34:14,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:34:14,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46381 states. [2020-10-27 23:34:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46381 to 46373. [2020-10-27 23:34:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46373 states. [2020-10-27 23:34:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46373 states to 46373 states and 69801 transitions. [2020-10-27 23:34:16,629 INFO L78 Accepts]: Start accepts. Automaton has 46373 states and 69801 transitions. Word has length 314 [2020-10-27 23:34:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:16,629 INFO L481 AbstractCegarLoop]: Abstraction has 46373 states and 69801 transitions. [2020-10-27 23:34:16,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:34:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46373 states and 69801 transitions. [2020-10-27 23:34:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 23:34:16,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:16,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:34:16,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:34:16,845 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1313913092, now seen corresponding path program 1 times [2020-10-27 23:34:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:16,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032933249] [2020-10-27 23:34:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:16,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:16,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:17,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:18,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:19,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:19,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:19,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:21,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:21,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-27 23:34:21,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:34:21,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:34:21,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:34:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-27 23:34:21,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 23:34:21,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:22,846 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:34:22,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:22,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:22,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032933249] [2020-10-27 23:34:22,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:22,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:34:22,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113341675] [2020-10-27 23:34:22,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:34:22,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:22,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:34:22,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:34:22,946 INFO L87 Difference]: Start difference. First operand 46373 states and 69801 transitions. Second operand 4 states. [2020-10-27 23:34:23,804 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 342 [2020-10-27 23:34:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:34:35,396 INFO L93 Difference]: Finished difference Result 131409 states and 197497 transitions. [2020-10-27 23:34:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:34:35,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-10-27 23:34:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:34:35,504 INFO L225 Difference]: With dead ends: 131409 [2020-10-27 23:34:35,504 INFO L226 Difference]: Without dead ends: 86889 [2020-10-27 23:34:35,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86889 states. [2020-10-27 23:34:39,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86889 to 85663. [2020-10-27 23:34:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85663 states. [2020-10-27 23:34:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85663 states to 85663 states and 127938 transitions. [2020-10-27 23:34:40,070 INFO L78 Accepts]: Start accepts. Automaton has 85663 states and 127938 transitions. Word has length 321 [2020-10-27 23:34:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:34:40,070 INFO L481 AbstractCegarLoop]: Abstraction has 85663 states and 127938 transitions. [2020-10-27 23:34:40,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:34:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 85663 states and 127938 transitions. [2020-10-27 23:34:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-27 23:34:40,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:34:40,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:34:40,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:34:40,143 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:34:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:34:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash 851254074, now seen corresponding path program 1 times [2020-10-27 23:34:40,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:34:40,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616427421] [2020-10-27 23:34:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:34:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:40,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:40,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:41,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:42,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:42,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:42,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:45,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:45,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-27 23:34:45,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:34:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:34:45,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:34:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:34:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 23:34:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:46,523 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 23:34:46,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:34:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:34:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:34:46,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:34:46,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:34:46,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:34:46,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:34:46,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:34:46,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:34:46,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:34:46,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:34:46,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:34:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:34:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616427421] [2020-10-27 23:34:46,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:34:46,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:34:46,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802076038] [2020-10-27 23:34:46,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:34:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:34:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:34:46,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:34:46,672 INFO L87 Difference]: Start difference. First operand 85663 states and 127938 transitions. Second operand 5 states.